[{"date_updated":"2026-04-20T05:09:57Z","author":[{"first_name":"Helene","last_name":"Wetter","full_name":"Wetter, Helene"},{"first_name":"Jan","id":"69187","full_name":"Wingenbach, Jan","last_name":"Wingenbach"},{"first_name":"Falk","full_name":"Rehberg, Falk","last_name":"Rehberg"},{"last_name":"Gao","full_name":"Gao, Wenlong","first_name":"Wenlong"},{"first_name":"Stefan","last_name":"Schumacher","orcid":"0000-0003-4042-4951","id":"27271","full_name":"Schumacher, Stefan"},{"first_name":"Thomas","full_name":"Zentgraf, Thomas","id":"30525","orcid":"0000-0002-8662-1101","last_name":"Zentgraf"}],"volume":13,"main_file_link":[{"url":"https://pubs.acs.org/doi/10.1021/acsphotonics.5c02865"}],"doi":"10.1021/acsphotonics.5c02865","publication_status":"published","publication_identifier":{"issn":["2330-4022","2330-4022"]},"citation":{"ama":"Wetter H, Wingenbach J, Rehberg F, Gao W, Schumacher S, Zentgraf T. Polarization- and Wave-Vector Selective Optical Metasurface with Near-Field Coupling. ACS Photonics. 2026;13:2128-2133. doi:10.1021/acsphotonics.5c02865","ieee":"H. Wetter, J. Wingenbach, F. Rehberg, W. Gao, S. Schumacher, and T. Zentgraf, “Polarization- and Wave-Vector Selective Optical Metasurface with Near-Field Coupling,” ACS Photonics, vol. 13, pp. 2128–2133, 2026, doi: 10.1021/acsphotonics.5c02865.","chicago":"Wetter, Helene, Jan Wingenbach, Falk Rehberg, Wenlong Gao, Stefan Schumacher, and Thomas Zentgraf. “Polarization- and Wave-Vector Selective Optical Metasurface with Near-Field Coupling.” ACS Photonics 13 (2026): 2128–33. https://doi.org/10.1021/acsphotonics.5c02865.","apa":"Wetter, H., Wingenbach, J., Rehberg, F., Gao, W., Schumacher, S., & Zentgraf, T. (2026). Polarization- and Wave-Vector Selective Optical Metasurface with Near-Field Coupling. ACS Photonics, 13, 2128–2133. https://doi.org/10.1021/acsphotonics.5c02865","mla":"Wetter, Helene, et al. “Polarization- and Wave-Vector Selective Optical Metasurface with Near-Field Coupling.” ACS Photonics, vol. 13, American Chemical Society (ACS), 2026, pp. 2128–33, doi:10.1021/acsphotonics.5c02865.","short":"H. Wetter, J. Wingenbach, F. Rehberg, W. Gao, S. Schumacher, T. Zentgraf, ACS Photonics 13 (2026) 2128–2133.","bibtex":"@article{Wetter_Wingenbach_Rehberg_Gao_Schumacher_Zentgraf_2026, title={Polarization- and Wave-Vector Selective Optical Metasurface with Near-Field Coupling}, volume={13}, DOI={10.1021/acsphotonics.5c02865}, journal={ACS Photonics}, publisher={American Chemical Society (ACS)}, author={Wetter, Helene and Wingenbach, Jan and Rehberg, Falk and Gao, Wenlong and Schumacher, Stefan and Zentgraf, Thomas}, year={2026}, pages={2128–2133} }"},"intvolume":" 13","page":"2128-2133","_id":"65316","user_id":"30525","department":[{"_id":"15"},{"_id":"230"},{"_id":"289"},{"_id":"623"}],"type":"journal_article","status":"public","publisher":"American Chemical Society (ACS)","date_created":"2026-04-02T07:25:30Z","title":"Polarization- and Wave-Vector Selective Optical Metasurface with Near-Field Coupling","quality_controlled":"1","year":"2026","external_id":{"arxiv":["2512.14452"]},"keyword":["metasurface","waveguides","Dirac point","polarization","negative coupling"],"language":[{"iso":"eng"}],"publication":"ACS Photonics","abstract":[{"text":"Metasurfaces are powerful tools for manipulating light using small structures on the nanoscale. In most metasurfaces, near-field couplings are treated as being unfavorable perturbations. Here, we experimentally investigate a structure consisting of sinusoidally modulated silicon waveguides where near-field coupling of local resonances leads to negative coupling, i.e., a negative coupling constant. This gives rise to wave-vector-dependent eigenstates of elliptical, linear, and circular polarizations. In particular, fully circular polarization states are not only present at a single point in momentum space (k-space) but also along a line. This circular polarization line, as well as a linear polarization line, emanates from a polarization degeneracy at the Dirac point. We experimentally validate the existence of these eigenstates and demonstrate the energy-, polarization-, and wave vector dependence of this metasurface as well as its sensitivity to fabrication tolerances. By tuning the incident k-vector, certain polarization-energy eigenstates are strongly reflected, allowing for uses in angle-tunable polarization filters and light sources.","lang":"eng"}]},{"status":"public","abstract":[{"lang":"eng","text":"Abstract Novel SBA-15-supported heterogeneous catalysts are synthesized and applied in the Mizoroki?Heck and the Suzuki?Miyaura cross-coupling reactions in green solvents like PEG or water. The structural properties of the products after each synthesis step are monitored by different analytics. The amount of amine/carboxyl groups and vanillin/histidine methyl ester and thermal stability are determined by TGA and elemental analysis, while ICP-OES delivered the amount of palladium of the catalysts. The morphology is investigated by SEM and XPS and confirms the presence of coordinated palladium in the zero-oxidation state. Gas adsorption analysis is conducted, which indicates the presence of palladium clusters in one of the two catalysts, which is underlined by BSE images combined with EDX. A detailed 13C ssNMR and DNP-enhanced 15N ssNMR spectral analysis is presented, which provides ultimate proof of the successful syntheses of the catalysts. The coordination of the palladium onto the carrier material is shown by combining the NMR spectral results with the results of the other analytics. First catalytic tests show for the Mizoroki?Heck reaction yields up to nearly 100% and for the Suzuki-Miyaura up to 88% in the presence of PEG and water, respectively."}],"type":"journal_article","publication":"ChemCatChem","extern":"1","language":[{"iso":"eng"}],"keyword":["SBA-15","Heterogeneous catalyst","Pd cross-coupling","Polyethylene glycol","Solid-state DNP NMR"],"user_id":"100715","_id":"64062","citation":{"mla":"Wissel, Till, et al. “Novel Heterogeneous Pd Catalysts for Cross-Coupling Reactions in Biocompatible Media: Structural Insights from Solid-State NMR Techniques.” ChemCatChem, vol. 17, John Wiley & Sons, Ltd, 2024, p. e202401511, doi:10.1002/cctc.202401511.","short":"T. Wissel, L. Rösler, M. Brodrecht, M.V. Höfler, K. Herr, M. Oliveira Jr., V. Klimavicius, M. Ebert, H. Breitzke, M. Hoffmann, G. Buntkowsky, T. Gutmann, ChemCatChem 17 (2024) e202401511.","bibtex":"@article{Wissel_Rösler_Brodrecht_Höfler_Herr_Oliveira Jr._Klimavicius_Ebert_Breitzke_Hoffmann_et al._2024, title={Novel Heterogeneous Pd Catalysts for Cross-Coupling Reactions in Biocompatible Media: Structural Insights from Solid-State NMR Techniques}, volume={17}, DOI={10.1002/cctc.202401511}, journal={ChemCatChem}, publisher={John Wiley & Sons, Ltd}, author={Wissel, Till and Rösler, Lorenz and Brodrecht, Martin and Höfler, Mark V. and Herr, Kevin and Oliveira Jr., Marcos and Klimavicius, Vytautas and Ebert, Martin and Breitzke, Hergen and Hoffmann, Markus and et al.}, year={2024}, pages={e202401511} }","apa":"Wissel, T., Rösler, L., Brodrecht, M., Höfler, M. V., Herr, K., Oliveira Jr., M., Klimavicius, V., Ebert, M., Breitzke, H., Hoffmann, M., Buntkowsky, G., & Gutmann, T. (2024). Novel Heterogeneous Pd Catalysts for Cross-Coupling Reactions in Biocompatible Media: Structural Insights from Solid-State NMR Techniques. ChemCatChem, 17, e202401511. https://doi.org/10.1002/cctc.202401511","ieee":"T. Wissel et al., “Novel Heterogeneous Pd Catalysts for Cross-Coupling Reactions in Biocompatible Media: Structural Insights from Solid-State NMR Techniques,” ChemCatChem, vol. 17, p. e202401511, 2024, doi: 10.1002/cctc.202401511.","chicago":"Wissel, Till, Lorenz Rösler, Martin Brodrecht, Mark V. Höfler, Kevin Herr, Marcos Oliveira Jr., Vytautas Klimavicius, et al. “Novel Heterogeneous Pd Catalysts for Cross-Coupling Reactions in Biocompatible Media: Structural Insights from Solid-State NMR Techniques.” ChemCatChem 17 (2024): e202401511. https://doi.org/10.1002/cctc.202401511.","ama":"Wissel T, Rösler L, Brodrecht M, et al. Novel Heterogeneous Pd Catalysts for Cross-Coupling Reactions in Biocompatible Media: Structural Insights from Solid-State NMR Techniques. ChemCatChem. 2024;17:e202401511. doi:10.1002/cctc.202401511"},"page":"e202401511","intvolume":" 17","year":"2024","publication_identifier":{"issn":["1867-3880"]},"doi":"10.1002/cctc.202401511","title":"Novel Heterogeneous Pd Catalysts for Cross-Coupling Reactions in Biocompatible Media: Structural Insights from Solid-State NMR Techniques","author":[{"first_name":"Till","last_name":"Wissel","full_name":"Wissel, Till"},{"last_name":"Rösler","full_name":"Rösler, Lorenz","first_name":"Lorenz"},{"first_name":"Martin","full_name":"Brodrecht, Martin","last_name":"Brodrecht"},{"full_name":"Höfler, Mark V.","last_name":"Höfler","first_name":"Mark V."},{"last_name":"Herr","full_name":"Herr, Kevin","first_name":"Kevin"},{"full_name":"Oliveira Jr., Marcos","last_name":"Oliveira Jr.","first_name":"Marcos"},{"last_name":"Klimavicius","full_name":"Klimavicius, Vytautas","first_name":"Vytautas"},{"first_name":"Martin","last_name":"Ebert","full_name":"Ebert, Martin"},{"first_name":"Hergen","last_name":"Breitzke","full_name":"Breitzke, Hergen"},{"first_name":"Markus","full_name":"Hoffmann, Markus","last_name":"Hoffmann"},{"full_name":"Buntkowsky, Gerd","last_name":"Buntkowsky","first_name":"Gerd"},{"first_name":"Torsten","last_name":"Gutmann","id":"118165","full_name":"Gutmann, Torsten"}],"date_created":"2026-02-07T16:18:53Z","volume":17,"publisher":"John Wiley & Sons, Ltd","date_updated":"2026-02-17T16:12:41Z"},{"language":[{"iso":"eng"}],"extern":"1","keyword":["solid-state nmr","dynamic nuclear polarization","Hydroxypropyl cellulose","Selective enhancement","Spin labelling"],"user_id":"100715","_id":"63988","status":"public","abstract":[{"lang":"eng","text":"This concept summarizes recent advances in development and application of DNP enhanced multinuclear solid-state NMR to study the molecular structure and surface functionalization of cellulose and paper-based materials. Moreover, a novel application is presented where DNP enhanced 13C and 15N solid-state NMR is used to identify structure moieties formed by cross-linking of hydroxypropyl cellulose. Given these two aspects of this concept-type of article, we thus combine both, a review on recent findings already published and unpublished recent data that complement the existing knowledge in the field of characterization of functional lignocellulosic materials by DNP enhanced solid-state NMR."}],"publication":"Journal of Magnetic Resonance Open","type":"journal_article","doi":"10.1016/j.jmro.2024.100163","title":"DNP enhanced solid-state NMR – A powerful tool to address the surface functionalization of cellulose/paper derived materials","volume":21,"date_created":"2026-02-07T15:46:32Z","author":[{"first_name":"Mark V.","full_name":"Höfler, Mark V.","last_name":"Höfler"},{"first_name":"Jonas","full_name":"Lins, Jonas","last_name":"Lins"},{"full_name":"Seelinger, David","last_name":"Seelinger","first_name":"David"},{"last_name":"Pachernegg","full_name":"Pachernegg, Lukas","first_name":"Lukas"},{"first_name":"Timmy","full_name":"Schäfer, Timmy","last_name":"Schäfer"},{"last_name":"Spirk","full_name":"Spirk, Stefan","first_name":"Stefan"},{"full_name":"Biesalski, Markus","last_name":"Biesalski","first_name":"Markus"},{"first_name":"Torsten","last_name":"Gutmann","id":"118165","full_name":"Gutmann, Torsten"}],"date_updated":"2026-02-17T16:16:40Z","page":"100163","intvolume":" 21","citation":{"apa":"Höfler, M. V., Lins, J., Seelinger, D., Pachernegg, L., Schäfer, T., Spirk, S., Biesalski, M., & Gutmann, T. (2024). DNP enhanced solid-state NMR – A powerful tool to address the surface functionalization of cellulose/paper derived materials. Journal of Magnetic Resonance Open, 21, 100163. https://doi.org/10.1016/j.jmro.2024.100163","mla":"Höfler, Mark V., et al. “DNP Enhanced Solid-State NMR – A Powerful Tool to Address the Surface Functionalization of Cellulose/Paper Derived Materials.” Journal of Magnetic Resonance Open, vol. 21, 2024, p. 100163, doi:10.1016/j.jmro.2024.100163.","bibtex":"@article{Höfler_Lins_Seelinger_Pachernegg_Schäfer_Spirk_Biesalski_Gutmann_2024, title={DNP enhanced solid-state NMR – A powerful tool to address the surface functionalization of cellulose/paper derived materials}, volume={21}, DOI={10.1016/j.jmro.2024.100163}, journal={Journal of Magnetic Resonance Open}, author={Höfler, Mark V. and Lins, Jonas and Seelinger, David and Pachernegg, Lukas and Schäfer, Timmy and Spirk, Stefan and Biesalski, Markus and Gutmann, Torsten}, year={2024}, pages={100163} }","short":"M.V. Höfler, J. Lins, D. Seelinger, L. Pachernegg, T. Schäfer, S. Spirk, M. Biesalski, T. Gutmann, Journal of Magnetic Resonance Open 21 (2024) 100163.","chicago":"Höfler, Mark V., Jonas Lins, David Seelinger, Lukas Pachernegg, Timmy Schäfer, Stefan Spirk, Markus Biesalski, and Torsten Gutmann. “DNP Enhanced Solid-State NMR – A Powerful Tool to Address the Surface Functionalization of Cellulose/Paper Derived Materials.” Journal of Magnetic Resonance Open 21 (2024): 100163. https://doi.org/10.1016/j.jmro.2024.100163.","ieee":"M. V. Höfler et al., “DNP enhanced solid-state NMR – A powerful tool to address the surface functionalization of cellulose/paper derived materials,” Journal of Magnetic Resonance Open, vol. 21, p. 100163, 2024, doi: 10.1016/j.jmro.2024.100163.","ama":"Höfler MV, Lins J, Seelinger D, et al. DNP enhanced solid-state NMR – A powerful tool to address the surface functionalization of cellulose/paper derived materials. Journal of Magnetic Resonance Open. 2024;21:100163. doi:10.1016/j.jmro.2024.100163"},"year":"2024"},{"volume":20,"date_created":"2026-02-07T15:42:00Z","author":[{"full_name":"Herr, Kevin","last_name":"Herr","first_name":"Kevin"},{"first_name":"Mark V.","full_name":"Höfler, Mark V.","last_name":"Höfler"},{"full_name":"Heise, Henrike","last_name":"Heise","first_name":"Henrike"},{"last_name":"Aussenac","full_name":"Aussenac, Fabien","first_name":"Fabien"},{"last_name":"Kornemann","full_name":"Kornemann, Felix","first_name":"Felix"},{"full_name":"Rosenberger, David","last_name":"Rosenberger","first_name":"David"},{"first_name":"Martin","last_name":"Brodrecht","full_name":"Brodrecht, Martin"},{"last_name":"Oliveira","full_name":"Oliveira, Marcos","first_name":"Marcos"},{"full_name":"Buntkowsky, Gerd","last_name":"Buntkowsky","first_name":"Gerd"},{"last_name":"Gutmann","full_name":"Gutmann, Torsten","id":"118165","first_name":"Torsten"}],"date_updated":"2026-02-17T16:17:22Z","doi":"10.1016/j.jmro.2024.100152","title":"Biradicals based on PROXYL containing building blocks for efficient dynamic nuclear polarization in biotolerant media","page":"100152","intvolume":" 20","citation":{"ieee":"K. Herr et al., “Biradicals based on PROXYL containing building blocks for efficient dynamic nuclear polarization in biotolerant media,” Journal of Magnetic Resonance Open, vol. 20, p. 100152, 2024, doi: 10.1016/j.jmro.2024.100152.","chicago":"Herr, Kevin, Mark V. Höfler, Henrike Heise, Fabien Aussenac, Felix Kornemann, David Rosenberger, Martin Brodrecht, Marcos Oliveira, Gerd Buntkowsky, and Torsten Gutmann. “Biradicals Based on PROXYL Containing Building Blocks for Efficient Dynamic Nuclear Polarization in Biotolerant Media.” Journal of Magnetic Resonance Open 20 (2024): 100152. https://doi.org/10.1016/j.jmro.2024.100152.","ama":"Herr K, Höfler MV, Heise H, et al. Biradicals based on PROXYL containing building blocks for efficient dynamic nuclear polarization in biotolerant media. Journal of Magnetic Resonance Open. 2024;20:100152. doi:10.1016/j.jmro.2024.100152","apa":"Herr, K., Höfler, M. V., Heise, H., Aussenac, F., Kornemann, F., Rosenberger, D., Brodrecht, M., Oliveira, M., Buntkowsky, G., & Gutmann, T. (2024). Biradicals based on PROXYL containing building blocks for efficient dynamic nuclear polarization in biotolerant media. Journal of Magnetic Resonance Open, 20, 100152. https://doi.org/10.1016/j.jmro.2024.100152","short":"K. Herr, M.V. Höfler, H. Heise, F. Aussenac, F. Kornemann, D. Rosenberger, M. Brodrecht, M. Oliveira, G. Buntkowsky, T. Gutmann, Journal of Magnetic Resonance Open 20 (2024) 100152.","bibtex":"@article{Herr_Höfler_Heise_Aussenac_Kornemann_Rosenberger_Brodrecht_Oliveira_Buntkowsky_Gutmann_2024, title={Biradicals based on PROXYL containing building blocks for efficient dynamic nuclear polarization in biotolerant media}, volume={20}, DOI={10.1016/j.jmro.2024.100152}, journal={Journal of Magnetic Resonance Open}, author={Herr, Kevin and Höfler, Mark V. and Heise, Henrike and Aussenac, Fabien and Kornemann, Felix and Rosenberger, David and Brodrecht, Martin and Oliveira, Marcos and Buntkowsky, Gerd and Gutmann, Torsten}, year={2024}, pages={100152} }","mla":"Herr, Kevin, et al. “Biradicals Based on PROXYL Containing Building Blocks for Efficient Dynamic Nuclear Polarization in Biotolerant Media.” Journal of Magnetic Resonance Open, vol. 20, 2024, p. 100152, doi:10.1016/j.jmro.2024.100152."},"year":"2024","user_id":"100715","_id":"63974","extern":"1","language":[{"iso":"eng"}],"keyword":["solid-state nmr","dynamic nuclear polarization","peptides","Biradicals","Spin labeling"],"publication":"Journal of Magnetic Resonance Open","type":"journal_article","status":"public","abstract":[{"lang":"eng","text":"A versatile strategy for synthesizing tailored peptide based biradicals is presented. By labeling the protected amino acid hydroxyproline with PROXYL via the OH functionality and using this building block in solid phase peptide synthesis (SPPS), the obtained peptides become polarization agents for DNP enhanced solid-state NMR in biotolerant media. To analyze the effect of the radical position on the enhancement factor, three different biradicals are synthesized. The PROXYL spin-label is inserted in a collagen inspired artificial peptide sequence by binding through the OH group of the hydroxyproline moieties at specific position in the chain. This labeling strategy is universally applicable for any hydroxyproline position in a peptide sequence since solid-phase peptide synthesis is used to insert the building block. High performance liquid chromatography (HPLC) and mass spectrometry (MS) analyses show the successful introduction of the spin label in the peptide chain and electron paramagnetic resonance (EPR) spectroscopy confirms its activity. Dynamic nuclear polarization (DNP) enhanced solid-state nuclear magnetic resonance (NMR) experiments performed on frozen aqueous glycerol-d8 solutions containing these peptide radicals show significantly higher enhancement factors of up to 45 in 1H→13C cross polarization magic angle spinning (CP MAS) experiments compared to an analogous mono-radical peptide including this building block (ε ≈ 14). Compared to commercial biradicals such as AMUPol for which enhancement factors {\\textgreater} 100 have been obtained in the past and which have been optimized in their structure, the obtained enhancement up to 45 for our biradicals presents a significant progress in radical design."}]},{"type":"journal_article","publication":"ChemCatChem","status":"public","abstract":[{"text":"Abstract Recent advances in solid-state nuclear magnetic resonance (NMR) spectroscopy, combined with dynamic nuclear polarization (DNP), quantum chemical DFT calculations, and gas-phase NMR spectroscopy investigating the structure and reactivity of heterogeneous catalysts are reviewed. The investigated catalysts range from classical mononuclear catalysts, like immobilized derivates of Wilkinson’s catalysts over binuclear catalysts such as the dirhodium paddlewheel catalyst to catalytic nanoparticles, employing various support materials, such as mesoporous silica gels, coordination polymers, and biomaterials such as cellulose.","lang":"eng"}],"user_id":"100715","_id":"63970","extern":"1","language":[{"iso":"eng"}],"keyword":["solid-state nmr","heterogeneous catalysis","dynamic nuclear polarization","Nanocatalysis","Surface-reactions"],"publication_identifier":{"issn":["1867-3880"]},"citation":{"apa":"Haro Mares, N., Logrado, M., Kergassner, J., Zhang, B., Gutmann, T., & Buntkowsky, G. (2024). Solid-State NMR of Heterogeneous Catalysts. ChemCatChem, e202401159. https://doi.org/10.1002/cctc.202401159","short":"N. Haro Mares, M. Logrado, J. Kergassner, B. Zhang, T. Gutmann, G. Buntkowsky, ChemCatChem (2024) e202401159.","mla":"Haro Mares, Nadia, et al. “Solid-State NMR of Heterogeneous Catalysts.” ChemCatChem, John Wiley & Sons, Ltd, 2024, p. e202401159, doi:10.1002/cctc.202401159.","bibtex":"@article{Haro Mares_Logrado_Kergassner_Zhang_Gutmann_Buntkowsky_2024, title={Solid-State NMR of Heterogeneous Catalysts}, DOI={10.1002/cctc.202401159}, journal={ChemCatChem}, publisher={John Wiley & Sons, Ltd}, author={Haro Mares, Nadia and Logrado, Millena and Kergassner, Jan and Zhang, Bingyu and Gutmann, Torsten and Buntkowsky, Gerd}, year={2024}, pages={e202401159} }","ama":"Haro Mares N, Logrado M, Kergassner J, Zhang B, Gutmann T, Buntkowsky G. Solid-State NMR of Heterogeneous Catalysts. ChemCatChem. Published online 2024:e202401159. doi:10.1002/cctc.202401159","chicago":"Haro Mares, Nadia, Millena Logrado, Jan Kergassner, Bingyu Zhang, Torsten Gutmann, and Gerd Buntkowsky. “Solid-State NMR of Heterogeneous Catalysts.” ChemCatChem, 2024, e202401159. https://doi.org/10.1002/cctc.202401159.","ieee":"N. Haro Mares, M. Logrado, J. Kergassner, B. Zhang, T. Gutmann, and G. Buntkowsky, “Solid-State NMR of Heterogeneous Catalysts,” ChemCatChem, p. e202401159, 2024, doi: 10.1002/cctc.202401159."},"page":"e202401159","year":"2024","author":[{"full_name":"Haro Mares, Nadia","last_name":"Haro Mares","first_name":"Nadia"},{"first_name":"Millena","full_name":"Logrado, Millena","last_name":"Logrado"},{"first_name":"Jan","last_name":"Kergassner","full_name":"Kergassner, Jan"},{"first_name":"Bingyu","last_name":"Zhang","full_name":"Zhang, Bingyu"},{"last_name":"Gutmann","full_name":"Gutmann, Torsten","id":"118165","first_name":"Torsten"},{"last_name":"Buntkowsky","full_name":"Buntkowsky, Gerd","first_name":"Gerd"}],"date_created":"2026-02-07T15:40:38Z","publisher":"John Wiley & Sons, Ltd","date_updated":"2026-02-17T16:17:30Z","doi":"10.1002/cctc.202401159","title":"Solid-State NMR of Heterogeneous Catalysts"},{"date_created":"2022-03-13T19:13:27Z","publisher":"Springer International Publishing","date_updated":"2022-03-13T19:14:34Z","doi":"10.1007/978-3-030-89582-2","title":"Research Approaches on Workplace Learning","related_material":{"link":[{"url":"https://link.springer.com/book/10.1007/978-3-030-89582-2#about","relation":"other"}]},"publication_status":"published","publication_identifier":{"isbn":["9783030895815","9783030895822"],"issn":["2210-5549","2210-5557"]},"citation":{"apa":"Harteis, C., Gijbels, D., & Kyndt, E. (Eds.). (2022). Research Approaches on Workplace Learning. Springer International Publishing. https://doi.org/10.1007/978-3-030-89582-2","short":"C. Harteis, D. Gijbels, E. Kyndt, eds., Research Approaches on Workplace Learning, Springer International Publishing, Cham, 2022.","mla":"Harteis, Christian, et al., editors. Research Approaches on Workplace Learning. Springer International Publishing, 2022, doi:10.1007/978-3-030-89582-2.","bibtex":"@book{Harteis_Gijbels_Kyndt_2022, place={Cham}, title={Research Approaches on Workplace Learning}, DOI={10.1007/978-3-030-89582-2}, publisher={Springer International Publishing}, year={2022} }","ama":"Harteis C, Gijbels D, Kyndt E, eds. Research Approaches on Workplace Learning. Springer International Publishing; 2022. doi:10.1007/978-3-030-89582-2","ieee":"C. Harteis, D. Gijbels, and E. Kyndt, Eds., Research Approaches on Workplace Learning. Cham: Springer International Publishing, 2022.","chicago":"Harteis, Christian, David Gijbels, and Eva Kyndt, eds. Research Approaches on Workplace Learning. Cham: Springer International Publishing, 2022. https://doi.org/10.1007/978-3-030-89582-2."},"year":"2022","place":"Cham","user_id":"50788","department":[{"_id":"452"}],"_id":"30291","alternative_title":["Insights from a Growing Field"],"language":[{"iso":"eng"}],"keyword":["new generation of researchersthe team level of workplace learningindividual level of workplace learningorganizational level of workplace learningsocietal level of workplace learninginterdependent cross-level research approachesWork AgencyWork-life perspectivesTeam learningTeam climateSocial influences on team learningKnowledge construction in teamsLearning cultureAcknowledgement of competencesTechnology and professional learningCreation of a learning eco-systemDiversity as a challenge for organisationsHigher education as preparation for WPLSocial support in networks and professional learningvocational and professional education"],"type":"book_editor","status":"public","editor":[{"last_name":"Harteis","orcid":"https://orcid.org/0000-0002-3570-7626","id":"27503","full_name":"Harteis, Christian","first_name":"Christian"},{"full_name":"Gijbels, David","last_name":"Gijbels","first_name":"David"},{"last_name":"Kyndt","full_name":"Kyndt, Eva","first_name":"Eva"}],"abstract":[{"lang":"eng","text":"The volume comprises a variety of research approaches that seek to explore and understand employees’ learning and development through and for work. Working life reveals challenges through technological, economic and societal development that can only rudimentarily be addressed by formal education and training. Workplace learning becomes more and more important for employees and enterprises to successfully cope with these challenges.\r\nWorkplace learning is a steadily growing field of educational research but it lacks so far a scholastic canon – there is rather a diversity of research approaches. This volume reflects this diversity by bringing together researchers from different countries and different theoretical backgrounds, presenting their current research on topics that all are relevant for understanding presages, processes and outcomes of workplace learning. Hence, this volume is of relevance for researchers as well as practitioners in the field and policy makers."}]},{"citation":{"chicago":"Gottschalk, Sebastian, Enes Yigitbas, Alexander Nowosad, and Gregor Engels. “Towards Situation-Specific Software Support for Cross-Organizational Design Thinking Processes.” In Proceedings of the 5th International Workshop on Software-Intensive Business (IWSiB’22) . ACM, 2022.","ieee":"S. Gottschalk, E. Yigitbas, A. Nowosad, and G. Engels, “Towards Situation-specific Software Support for Cross-organizational Design Thinking Processes,” 2022.","ama":"Gottschalk S, Yigitbas E, Nowosad A, Engels G. Towards Situation-specific Software Support for Cross-organizational Design Thinking Processes. In: Proceedings of the 5th International Workshop on Software-Intensive Business (IWSiB’22) . ACM; 2022.","bibtex":"@inproceedings{Gottschalk_Yigitbas_Nowosad_Engels_2022, title={Towards Situation-specific Software Support for Cross-organizational Design Thinking Processes}, booktitle={Proceedings of the 5th International Workshop on Software-intensive Business (IWSiB’22) }, publisher={ACM}, author={Gottschalk, Sebastian and Yigitbas, Enes and Nowosad, Alexander and Engels, Gregor}, year={2022} }","mla":"Gottschalk, Sebastian, et al. “Towards Situation-Specific Software Support for Cross-Organizational Design Thinking Processes.” Proceedings of the 5th International Workshop on Software-Intensive Business (IWSiB’22) , ACM, 2022.","short":"S. Gottschalk, E. Yigitbas, A. Nowosad, G. Engels, in: Proceedings of the 5th International Workshop on Software-Intensive Business (IWSiB’22) , ACM, 2022.","apa":"Gottschalk, S., Yigitbas, E., Nowosad, A., & Engels, G. (2022). Towards Situation-specific Software Support for Cross-organizational Design Thinking Processes. Proceedings of the 5th International Workshop on Software-Intensive Business (IWSiB’22) ."},"year":"2022","title":"Towards Situation-specific Software Support for Cross-organizational Design Thinking Processes","author":[{"first_name":"Sebastian","id":"47208","full_name":"Gottschalk, Sebastian","last_name":"Gottschalk"},{"first_name":"Enes","full_name":"Yigitbas, Enes","id":"8447","orcid":"0000-0002-5967-833X","last_name":"Yigitbas"},{"first_name":"Alexander","last_name":"Nowosad","full_name":"Nowosad, Alexander"},{"first_name":"Gregor","last_name":"Engels","full_name":"Engels, Gregor","id":"107"}],"date_created":"2022-07-01T08:14:16Z","date_updated":"2023-03-14T09:59:05Z","publisher":"ACM","status":"public","abstract":[{"lang":"eng","text":"Due to the increasing influences of a VUCA world, design thinking workshops have been established as a standard technique to build solutions according to uncertain customer needs. Concerning the ongoing pandemic and rising development of solutions across organizations, more and more workshops were conducted online with software support. However, existing software tools insufficiently address the different workshop situations in terms of the process (i.e., fixed tasks to conduct), the place (e.g., static online whiteboards), and people (i.e., synchronous working of all stakeholders).\r\nTherefore, we propose a design science study to develop a situation-specific software support that can be configured with flexible development processes, different places, and task-related people. Based on practical experience in existing research projects, we derive the initial design requirements and map them to a set of design principles. Out of that, we design a concept with its implementation as a software tool and point out open challenges. "}],"type":"conference","publication":"Proceedings of the 5th International Workshop on Software-intensive Business (IWSiB'22) ","language":[{"iso":"eng"}],"keyword":["design thinking","situation-specific","cross-organizational","software support"],"user_id":"8447","department":[{"_id":"66"},{"_id":"534"}],"project":[{"name":"SFB 901: SFB 901","_id":"1"},{"name":"SFB 901 - C: SFB 901 - Project Area C","_id":"4"},{"_id":"17","name":"SFB 901 - C5: SFB 901 - Subproject C5"}],"_id":"32309"},{"abstract":[{"lang":"eng","text":"Several methods are available to answer questions regarding similarity and accuracy,\r\neach of which has specific properties and limitations. This study focuses on the\r\nLatent Congruence Model (LCM; Cheung, 2009), because of its capacity to deal\r\nwith cross-informant measurement invariance issues. Until now, no cross-national\r\napplications of LCM are present in the literature, perhaps because of the difficulty\r\nto deal with both cross-national and cross-informant measurement issues implied by\r\nthose models. This study presents a step-by-step procedure to apply LCM to dyadic\r\ncross-national research designs controlling for both cross-national and cross-informant\r\nmeasurement invariance. An illustrative example on parent–child support exchanges in\r\nItaly and Germany is provided. Findings help to show the different possible scenarios\r\nof partial invariance, and a discussion related to how to deal with those scenarios is\r\nprovided. Future perspectives in the study of parent–child similarity and accuracy in\r\ncross-national research will be discussed."}],"publication":"Frontiers in Psychology","keyword":["latent congruence model","measurement invariance","similarity","accuracy","cross-national","cross-informant","parent-child relationship","support exchanges"],"language":[{"iso":"eng"}],"year":"2021","title":"Latent Congruence Model to Investigate Similarity and Accuracy in Family Members' Perception: The Challenge of Cross-National and Cross-Informant Measurement (Non)Invariance","publisher":"Frontiers Media SA","date_created":"2022-08-03T05:59:20Z","status":"public","type":"journal_article","article_number":"672383","_id":"32560","department":[{"_id":"427"}],"user_id":"42165","intvolume":" 12","citation":{"ama":"Tagliabue S, Zambelli M, Sorgente A, et al. Latent Congruence Model to Investigate Similarity and Accuracy in Family Members’ Perception: The Challenge of Cross-National and Cross-Informant Measurement (Non)Invariance. Frontiers in Psychology. 2021;12. doi:10.3389/fpsyg.2021.672383","chicago":"Tagliabue, Semira, Michela Zambelli, Angela Sorgente, Sabrina Sommer, Christian Hoellger, Heike M. Buhl, and Margherita Lanz. “Latent Congruence Model to Investigate Similarity and Accuracy in Family Members’ Perception: The Challenge of Cross-National and Cross-Informant Measurement (Non)Invariance.” Frontiers in Psychology 12 (2021). https://doi.org/10.3389/fpsyg.2021.672383.","ieee":"S. Tagliabue et al., “Latent Congruence Model to Investigate Similarity and Accuracy in Family Members’ Perception: The Challenge of Cross-National and Cross-Informant Measurement (Non)Invariance,” Frontiers in Psychology, vol. 12, Art. no. 672383, 2021, doi: 10.3389/fpsyg.2021.672383.","bibtex":"@article{Tagliabue_Zambelli_Sorgente_Sommer_Hoellger_Buhl_Lanz_2021, title={Latent Congruence Model to Investigate Similarity and Accuracy in Family Members’ Perception: The Challenge of Cross-National and Cross-Informant Measurement (Non)Invariance}, volume={12}, DOI={10.3389/fpsyg.2021.672383}, number={672383}, journal={Frontiers in Psychology}, publisher={Frontiers Media SA}, author={Tagliabue, Semira and Zambelli, Michela and Sorgente, Angela and Sommer, Sabrina and Hoellger, Christian and Buhl, Heike M. and Lanz, Margherita}, year={2021} }","short":"S. Tagliabue, M. Zambelli, A. Sorgente, S. Sommer, C. Hoellger, H.M. Buhl, M. Lanz, Frontiers in Psychology 12 (2021).","mla":"Tagliabue, Semira, et al. “Latent Congruence Model to Investigate Similarity and Accuracy in Family Members’ Perception: The Challenge of Cross-National and Cross-Informant Measurement (Non)Invariance.” Frontiers in Psychology, vol. 12, 672383, Frontiers Media SA, 2021, doi:10.3389/fpsyg.2021.672383.","apa":"Tagliabue, S., Zambelli, M., Sorgente, A., Sommer, S., Hoellger, C., Buhl, H. M., & Lanz, M. (2021). Latent Congruence Model to Investigate Similarity and Accuracy in Family Members’ Perception: The Challenge of Cross-National and Cross-Informant Measurement (Non)Invariance. Frontiers in Psychology, 12, Article 672383. https://doi.org/10.3389/fpsyg.2021.672383"},"publication_identifier":{"issn":["1664-1078"]},"publication_status":"published","doi":"10.3389/fpsyg.2021.672383","main_file_link":[{"url":"https://www.frontiersin.org/articles/10.3389/fpsyg.2021.672383/pdf","open_access":"1"}],"oa":"1","date_updated":"2022-08-29T06:38:34Z","volume":12,"author":[{"first_name":"Semira","last_name":"Tagliabue","full_name":"Tagliabue, Semira"},{"first_name":"Michela","last_name":"Zambelli","full_name":"Zambelli, Michela"},{"first_name":"Angela","last_name":"Sorgente","full_name":"Sorgente, Angela"},{"first_name":"Sabrina","last_name":"Sommer","full_name":"Sommer, Sabrina"},{"first_name":"Christian","last_name":"Hoellger","full_name":"Hoellger, Christian"},{"first_name":"Heike M.","last_name":"Buhl","id":"27152","full_name":"Buhl, Heike M."},{"full_name":"Lanz, Margherita","last_name":"Lanz","first_name":"Margherita"}]},{"status":"public","type":"journal_article","extern":"1","user_id":"100715","_id":"64052","page":"1907–1913","intvolume":" 22","citation":{"bibtex":"@article{Venel_Nagashima_Rankin_Anquetil_Klimavicius_Gutmann_Buntkowsky_Derenne_Lafon_Huguet_et al._2021, title={Characterization of Functional Groups in Estuarine Dissolved Organic Matter by DNP-enhanced 15N and 13C Solid-State NMR}, volume={22}, DOI={10.1002/cphc.202100334}, number={18}, journal={Chemphyschem}, publisher={John Wiley & Sons, Ltd}, author={Venel, Florian and Nagashima, Hiroki and Rankin, Andrew G. M. and Anquetil, Christelle and Klimavicius, Vytautas and Gutmann, Torsten and Buntkowsky, Gerd and Derenne, Sylvie and Lafon, Olivier and Huguet, Arnaud and et al.}, year={2021}, pages={1907–1913} }","mla":"Venel, Florian, et al. “Characterization of Functional Groups in Estuarine Dissolved Organic Matter by DNP-Enhanced 15N and 13C Solid-State NMR.” Chemphyschem, vol. 22, no. 18, John Wiley & Sons, Ltd, 2021, pp. 1907–1913, doi:10.1002/cphc.202100334.","short":"F. Venel, H. Nagashima, A.G.M. Rankin, C. Anquetil, V. Klimavicius, T. Gutmann, G. Buntkowsky, S. Derenne, O. Lafon, A. Huguet, F. Pourpoint, Chemphyschem 22 (2021) 1907–1913.","apa":"Venel, F., Nagashima, H., Rankin, A. G. M., Anquetil, C., Klimavicius, V., Gutmann, T., Buntkowsky, G., Derenne, S., Lafon, O., Huguet, A., & Pourpoint, F. (2021). Characterization of Functional Groups in Estuarine Dissolved Organic Matter by DNP-enhanced 15N and 13C Solid-State NMR. Chemphyschem, 22(18), 1907–1913. https://doi.org/10.1002/cphc.202100334","chicago":"Venel, Florian, Hiroki Nagashima, Andrew G. M. Rankin, Christelle Anquetil, Vytautas Klimavicius, Torsten Gutmann, Gerd Buntkowsky, et al. “Characterization of Functional Groups in Estuarine Dissolved Organic Matter by DNP-Enhanced 15N and 13C Solid-State NMR.” Chemphyschem 22, no. 18 (2021): 1907–1913. https://doi.org/10.1002/cphc.202100334.","ieee":"F. Venel et al., “Characterization of Functional Groups in Estuarine Dissolved Organic Matter by DNP-enhanced 15N and 13C Solid-State NMR,” Chemphyschem, vol. 22, no. 18, pp. 1907–1913, 2021, doi: 10.1002/cphc.202100334.","ama":"Venel F, Nagashima H, Rankin AGM, et al. Characterization of Functional Groups in Estuarine Dissolved Organic Matter by DNP-enhanced 15N and 13C Solid-State NMR. Chemphyschem. 2021;22(18):1907–1913. doi:10.1002/cphc.202100334"},"publication_identifier":{"issn":["1439-4235; 1439-7641"]},"doi":"10.1002/cphc.202100334","volume":22,"author":[{"last_name":"Venel","full_name":"Venel, Florian","first_name":"Florian"},{"first_name":"Hiroki","last_name":"Nagashima","full_name":"Nagashima, Hiroki"},{"full_name":"Rankin, Andrew G. M.","last_name":"Rankin","first_name":"Andrew G. M."},{"full_name":"Anquetil, Christelle","last_name":"Anquetil","first_name":"Christelle"},{"first_name":"Vytautas","full_name":"Klimavicius, Vytautas","last_name":"Klimavicius"},{"id":"118165","full_name":"Gutmann, Torsten","last_name":"Gutmann","first_name":"Torsten"},{"first_name":"Gerd","full_name":"Buntkowsky, Gerd","last_name":"Buntkowsky"},{"first_name":"Sylvie","full_name":"Derenne, Sylvie","last_name":"Derenne"},{"first_name":"Olivier","last_name":"Lafon","full_name":"Lafon, Olivier"},{"first_name":"Arnaud","full_name":"Huguet, Arnaud","last_name":"Huguet"},{"full_name":"Pourpoint, Frédérique","last_name":"Pourpoint","first_name":"Frédérique"}],"date_updated":"2026-02-17T16:12:56Z","abstract":[{"lang":"eng","text":"Abstract Estuaries are key ecosystems with unique biodiversity and are of high economic importance. Along the estuaries, variations in environmental parameters, such as salinity and light penetration, can modify the characteristics of dissolved organic matter (DOM). Nevertheless, there is still limited information about the atomic-level transformations of DOM in this ecosystem. Solid-state NMR spectroscopy provides unique insights into the nature of functional groups in DOM. A major limitation of this technique is its lack of sensivity, which results in experimental time of tens of hours for the acquisition of 13C NMR spectra and generally precludes the observation of 15N nuclei for DOM. We show here how the sensitivity of solid-state NMR experiments on DOM of Seine estuary can be enhanced using dynamic nuclear polarization (DNP) under magic-angle spinning. This technique allows the acquisition of 13C NMR spectra of these samples in few minutes, instead of hours for conventional solid-state NMR. Both conventional and DNP-enhanced 13C NMR spectra indicate that the 13C local environments in DOM are not strongly modified along the Seine estuary. Furthermore, the sensitivity gain provided by the DNP allows the detection of 15N NMR signal of DOM, in spite of the low nitrogen content. These spectra reveal that the majority of nitrogen is in the amide form in these DOM samples and show an increased disorder around these amide groups near the mouth of the Seine."}],"publication":"Chemphyschem","language":[{"iso":"eng"}],"keyword":["dynamic nuclear polarization","13C","15N","dissolved organic matter","Seine estuary"],"year":"2021","issue":"18","title":"Characterization of Functional Groups in Estuarine Dissolved Organic Matter by DNP-enhanced 15N and 13C Solid-State NMR","date_created":"2026-02-07T16:14:11Z","publisher":"John Wiley & Sons, Ltd"},{"year":"2019","issue":"3","title":"Pricing and issuance dependencies in SFP portfolios","date_created":"2018-10-01T11:45:28Z","file":[{"relation":"main_file","success":1,"content_type":"application/pdf","access_level":"closed","file_name":"Pelster 2019 SFP.pdf","file_id":"7566","file_size":1658836,"creator":"bange","date_created":"2019-02-06T13:06:50Z","date_updated":"2019-02-06T13:06:50Z"}],"abstract":[{"lang":"eng","text":"We exploit a unique sample of structured financial products (SFPs) to analyze pricing and issuance dependencies among different types of such market‐linked investment vehicles. Our study provides evidence of cross‐pricing between products with complementary payoff profiles. Such dependencies may be explained by issuers’ efforts to generate order flow for products that supplement their current SFP risk exposure. Additionally, we observe issuance patterns in line with the argument that issuers exploit the complementarity payout profiles when bringing SFPs to market. Our study emphasizes cross‐pricing from a perspective not previously considered in the literature."}],"publication":"Journal of Futures Markets","language":[{"iso":"eng"}],"keyword":["cross‐pricing","discount certificate","hedging","issuance decisions","put warrants","structured financial products"],"ddc":["330"],"intvolume":" 39","page":"342-365","jel":["G12","G13","G14","G24"],"citation":{"short":"M. Pelster, A. Schertler, Journal of Futures Markets 39 (2019) 342–365.","bibtex":"@article{Pelster_Schertler_2019, title={Pricing and issuance dependencies in SFP portfolios}, volume={39}, DOI={10.1002/fut.21978}, number={3}, journal={Journal of Futures Markets}, author={Pelster, Matthias and Schertler, Andrea}, year={2019}, pages={342–365} }","mla":"Pelster, Matthias, and Andrea Schertler. “Pricing and Issuance Dependencies in SFP Portfolios.” Journal of Futures Markets, vol. 39, no. 3, 2019, pp. 342–65, doi:10.1002/fut.21978.","apa":"Pelster, M., & Schertler, A. (2019). Pricing and issuance dependencies in SFP portfolios. Journal of Futures Markets, 39(3), 342–365. https://doi.org/10.1002/fut.21978","ieee":"M. Pelster and A. Schertler, “Pricing and issuance dependencies in SFP portfolios,” Journal of Futures Markets, vol. 39, no. 3, pp. 342–365, 2019.","chicago":"Pelster, Matthias, and Andrea Schertler. “Pricing and Issuance Dependencies in SFP Portfolios.” Journal of Futures Markets 39, no. 3 (2019): 342–65. https://doi.org/10.1002/fut.21978.","ama":"Pelster M, Schertler A. Pricing and issuance dependencies in SFP portfolios. Journal of Futures Markets. 2019;39(3):342-365. doi:10.1002/fut.21978"},"has_accepted_license":"1","publication_status":"published","doi":"10.1002/fut.21978","volume":39,"author":[{"id":"67265","full_name":"Pelster, Matthias","last_name":"Pelster","orcid":" https://orcid.org/0000-0001-5740-2420","first_name":"Matthias"},{"last_name":"Schertler","full_name":"Schertler, Andrea","first_name":"Andrea"}],"date_updated":"2022-01-06T07:01:10Z","status":"public","type":"journal_article","file_date_updated":"2019-02-06T13:06:50Z","article_type":"original","department":[{"_id":"186"},{"_id":"578"}],"user_id":"21810","_id":"4561"},{"status":"public","abstract":[{"lang":"eng","text":"A number of Ir-N-heterocyclic carbene (Ir-NHC) complexes with asymmetric N-heterocyclic carbene (NHC) ligands have been prepared and examined for signal amplification by reversible exchange (SABRE). Pyridine was chosen as model compound for hyperpolarization experiments. This substrate was examined in a solvent mixture using several Ir-NHC complexes, which differ in their NHC ligands. The SABRE polarization was created at 6mT and the H-1 nuclear magnetic resonancesignals were detected at 7T. We show that asymmetric NHC ligands, because of their favorable chemistry, can adapt the SABREactive complexes to different chemical scenarios."}],"publication":"Applied Magnetic Resonance","type":"journal_article","extern":"1","language":[{"iso":"eng"}],"keyword":["dynamic nuclear-polarization","hyperpolarization","enhancement","hydrogen induced polarization","olefin-metathesis catalysts","parahydrogen-induced polarization","peptides","Physics","sabre","spectroscopy"],"user_id":"100715","_id":"63969","intvolume":" 50","page":"895–902","citation":{"ieee":"S. Hadjiali et al., “Substituent Influences on the NMR Signal Amplification of Ir Complexes with Heterocyclic Carbene Ligands,” Applied Magnetic Resonance, vol. 50, no. 7, pp. 895–902, 2019, doi: 10.1007/s00723-019-01115-x.","chicago":"Hadjiali, S., R. Savka, M. Plaumann, U. Bommerich, S. Bothe, Torsten Gutmann, T. Ratajczyk, et al. “Substituent Influences on the NMR Signal Amplification of Ir Complexes with Heterocyclic Carbene Ligands.” Applied Magnetic Resonance 50, no. 7 (2019): 895–902. https://doi.org/10.1007/s00723-019-01115-x.","ama":"Hadjiali S, Savka R, Plaumann M, et al. Substituent Influences on the NMR Signal Amplification of Ir Complexes with Heterocyclic Carbene Ligands. Applied Magnetic Resonance. 2019;50(7):895–902. doi:10.1007/s00723-019-01115-x","short":"S. Hadjiali, R. Savka, M. Plaumann, U. Bommerich, S. Bothe, T. Gutmann, T. Ratajczyk, J. Bernarding, H.H. Limbach, H. Plenio, G. Buntkowsky, Applied Magnetic Resonance 50 (2019) 895–902.","mla":"Hadjiali, S., et al. “Substituent Influences on the NMR Signal Amplification of Ir Complexes with Heterocyclic Carbene Ligands.” Applied Magnetic Resonance, vol. 50, no. 7, 2019, pp. 895–902, doi:10.1007/s00723-019-01115-x.","bibtex":"@article{Hadjiali_Savka_Plaumann_Bommerich_Bothe_Gutmann_Ratajczyk_Bernarding_Limbach_Plenio_et al._2019, title={Substituent Influences on the NMR Signal Amplification of Ir Complexes with Heterocyclic Carbene Ligands}, volume={50}, DOI={10.1007/s00723-019-01115-x}, number={7}, journal={Applied Magnetic Resonance}, author={Hadjiali, S. and Savka, R. and Plaumann, M. and Bommerich, U. and Bothe, S. and Gutmann, Torsten and Ratajczyk, T. and Bernarding, J. and Limbach, H. H. and Plenio, H. and et al.}, year={2019}, pages={895–902} }","apa":"Hadjiali, S., Savka, R., Plaumann, M., Bommerich, U., Bothe, S., Gutmann, T., Ratajczyk, T., Bernarding, J., Limbach, H. H., Plenio, H., & Buntkowsky, G. (2019). Substituent Influences on the NMR Signal Amplification of Ir Complexes with Heterocyclic Carbene Ligands. Applied Magnetic Resonance, 50(7), 895–902. https://doi.org/10.1007/s00723-019-01115-x"},"year":"2019","issue":"7","publication_identifier":{"issn":["1613-7507"]},"doi":"10.1007/s00723-019-01115-x","title":"Substituent Influences on the NMR Signal Amplification of Ir Complexes with Heterocyclic Carbene Ligands","volume":50,"author":[{"first_name":"S.","full_name":"Hadjiali, S.","last_name":"Hadjiali"},{"first_name":"R.","last_name":"Savka","full_name":"Savka, R."},{"first_name":"M.","last_name":"Plaumann","full_name":"Plaumann, M."},{"last_name":"Bommerich","full_name":"Bommerich, U.","first_name":"U."},{"last_name":"Bothe","full_name":"Bothe, S.","first_name":"S."},{"first_name":"Torsten","last_name":"Gutmann","full_name":"Gutmann, Torsten","id":"118165"},{"first_name":"T.","full_name":"Ratajczyk, T.","last_name":"Ratajczyk"},{"last_name":"Bernarding","full_name":"Bernarding, J.","first_name":"J."},{"last_name":"Limbach","full_name":"Limbach, H. H.","first_name":"H. H."},{"full_name":"Plenio, H.","last_name":"Plenio","first_name":"H."},{"first_name":"G.","last_name":"Buntkowsky","full_name":"Buntkowsky, G."}],"date_created":"2026-02-07T15:40:18Z","date_updated":"2026-02-17T16:17:34Z"},{"year":"2019","page":"1–82","intvolume":" 97","citation":{"short":"T. Gutmann, P.B. Groszewicz, G. Buntkowsky, Annual Reports on NMR Spectroscopy 97 (2019) 1–82.","bibtex":"@article{Gutmann_Groszewicz_Buntkowsky_2019, title={Solid-state NMR of nanocrystals}, volume={97}, DOI={10.1016/bs.arnmr.2018.12.001}, journal={Annual Reports on NMR Spectroscopy}, author={Gutmann, Torsten and Groszewicz, Pedro B. and Buntkowsky, Gerd}, year={2019}, pages={1–82} }","mla":"Gutmann, Torsten, et al. “Solid-State NMR of Nanocrystals.” Annual Reports on NMR Spectroscopy, vol. 97, 2019, pp. 1–82, doi:10.1016/bs.arnmr.2018.12.001.","apa":"Gutmann, T., Groszewicz, P. B., & Buntkowsky, G. (2019). Solid-state NMR of nanocrystals. Annual Reports on NMR Spectroscopy, 97, 1–82. https://doi.org/10.1016/bs.arnmr.2018.12.001","ieee":"T. Gutmann, P. B. Groszewicz, and G. Buntkowsky, “Solid-state NMR of nanocrystals,” Annual Reports on NMR Spectroscopy, vol. 97, pp. 1–82, 2019, doi: 10.1016/bs.arnmr.2018.12.001.","chicago":"Gutmann, Torsten, Pedro B. Groszewicz, and Gerd Buntkowsky. “Solid-State NMR of Nanocrystals.” Annual Reports on NMR Spectroscopy 97 (2019): 1–82. https://doi.org/10.1016/bs.arnmr.2018.12.001.","ama":"Gutmann T, Groszewicz PB, Buntkowsky G. Solid-state NMR of nanocrystals. Annual Reports on NMR Spectroscopy. 2019;97:1–82. doi:10.1016/bs.arnmr.2018.12.001"},"date_updated":"2026-02-17T16:17:56Z","volume":97,"author":[{"first_name":"Torsten","full_name":"Gutmann, Torsten","id":"118165","last_name":"Gutmann"},{"full_name":"Groszewicz, Pedro B.","last_name":"Groszewicz","first_name":"Pedro B."},{"last_name":"Buntkowsky","full_name":"Buntkowsky, Gerd","first_name":"Gerd"}],"date_created":"2026-02-07T15:37:03Z","title":"Solid-state NMR of nanocrystals","doi":"10.1016/bs.arnmr.2018.12.001","publication":"Annual Reports on NMR Spectroscopy","type":"journal_article","abstract":[{"text":"Recent advances in solid-state nuclear magnetic resonance (NMR) spectroscopy and dynamic nuclear polarization (DNP) of nanostructured materials are reviewed. A first group of materials is based on crystalline nanocellulose (CNC) or microcrystalline cellulose (MCC), which are used as carrier materials for dye molecules, catalysts or in combination with heterocyclic molecules as ion conducting membranes. These materials have widespread applications in sensorics, optics, catalysis or fuel cell research. A second group are metal oxides such as V-Mo-W oxides, which are of enormous importance in the manufacturing process of basic chemicals. The third group are catalytically active nanocrystalline metal nanoparticles, coated with protectants or embedded in polymers. The last group includes of lead-free perovskite materials, which are employed as environmentally benign substitution materials for conventional lead-based electronics materials. These materials are discussed in terms of their application and physico-chemical characterization by solid-state NMR techniques, combined with gas-phase NMR and quantum-chemical modelling on the density functional theory (DFT) level. The application of multinuclear 1H, 2H, 13C, 15N and 23Na solid state NMR techniques under static or MAS conditions for the characterization of these materials, their surfaces and processes on their surfaces is discussed. Moreover, the analytic power of the combination of these techniques with DNP for the identification of low-concentrated carbon and nitrogen containing surface species in natural abundance is reviewed. Finally, approaches for sensitivity enhancement by DNP of quadrupolar nuclei such as 17O and 51V are presented that enable the identification of catalytic sites in metal oxide catalysts.","lang":"eng"}],"status":"public","_id":"63960","user_id":"100715","keyword":["solid-state nmr","heterogeneous catalysis","dynamic nuclear polarization","Ferroelectrics","Nanocatalysis","Surface reactions"],"language":[{"iso":"eng"}],"extern":"1"},{"issue":"11","publication_identifier":{"issn":["2079-4991"]},"citation":{"ama":"Vowinkel S, Paul S, Gutmann T, Gallei M. Free-Standing and Self-Crosslinkable Hybrid Films by Core-Shell Particle Design and Processing. Nanomaterials. 2017;7(11):390. doi:10.3390/nano7110390","chicago":"Vowinkel, S., S. Paul, Torsten Gutmann, and M. Gallei. “Free-Standing and Self-Crosslinkable Hybrid Films by Core-Shell Particle Design and Processing.” Nanomaterials 7, no. 11 (2017): 390. https://doi.org/10.3390/nano7110390.","ieee":"S. Vowinkel, S. Paul, T. Gutmann, and M. Gallei, “Free-Standing and Self-Crosslinkable Hybrid Films by Core-Shell Particle Design and Processing,” Nanomaterials, vol. 7, no. 11, p. 390, 2017, doi: 10.3390/nano7110390.","bibtex":"@article{Vowinkel_Paul_Gutmann_Gallei_2017, title={Free-Standing and Self-Crosslinkable Hybrid Films by Core-Shell Particle Design and Processing}, volume={7}, DOI={10.3390/nano7110390}, number={11}, journal={Nanomaterials}, author={Vowinkel, S. and Paul, S. and Gutmann, Torsten and Gallei, M.}, year={2017}, pages={390} }","short":"S. Vowinkel, S. Paul, T. Gutmann, M. Gallei, Nanomaterials 7 (2017) 390.","mla":"Vowinkel, S., et al. “Free-Standing and Self-Crosslinkable Hybrid Films by Core-Shell Particle Design and Processing.” Nanomaterials, vol. 7, no. 11, 2017, p. 390, doi:10.3390/nano7110390.","apa":"Vowinkel, S., Paul, S., Gutmann, T., & Gallei, M. (2017). Free-Standing and Self-Crosslinkable Hybrid Films by Core-Shell Particle Design and Processing. Nanomaterials, 7(11), 390. https://doi.org/10.3390/nano7110390"},"intvolume":" 7","page":"390","year":"2017","date_created":"2026-02-07T16:15:23Z","author":[{"last_name":"Vowinkel","full_name":"Vowinkel, S.","first_name":"S."},{"first_name":"S.","full_name":"Paul, S.","last_name":"Paul"},{"first_name":"Torsten","full_name":"Gutmann, Torsten","id":"118165","last_name":"Gutmann"},{"first_name":"M.","full_name":"Gallei, M.","last_name":"Gallei"}],"volume":7,"date_updated":"2026-02-17T16:12:54Z","doi":"10.3390/nano7110390","title":"Free-Standing and Self-Crosslinkable Hybrid Films by Core-Shell Particle Design and Processing","type":"journal_article","publication":"Nanomaterials","status":"public","abstract":[{"text":"The utilization and preparation of functional hybrid films for optical sensing applications and membranes is of utmost importance. In this work, we report the convenient and scalable preparation of self-crosslinking particle-based films derived by directed self-assembly of alkoxysilane-based cross-linkers as part of a core-shell particle architecture. The synthesis of well-designed monodisperse core-shell particles by emulsion polymerization is the basic prerequisite for subsequent particle processing via the melt-shear organization technique. In more detail, the core particles consist of polystyrene (PS) or poly(methyl methacrylate) (PMMA), while the comparably soft particle shell consists of poly(ethyl acrylate) (PEA) and different alkoxysilane-based poly(methacrylate)s. For hybrid film formation and convenient self-cross-linking, different alkyl groups at the siloxane moieties were investigated in detail by solid-state Magic-Angle Spinning Nuclear Magnetic Resonance (MAS, NMR) spectroscopy revealing different crosslinking capabilities, which strongly influence the properties of the core or shell particle films with respect to transparency and iridescent reflection colors. Furthermore, solid-state NMR spectroscopy and investigation of the thermal properties by differential scanning calorimetry (DSC) measurements allow for insights into the cross-linking capabilities prior to and after synthesis, as well as after the thermally and pressure-induced processing steps. Subsequently, free-standing and self-crosslinked particle-based films featuring excellent particle order are obtained by application of the melt-shear organization technique, as shown by microscopy (TEM, SEM).","lang":"eng"}],"user_id":"100715","_id":"64053","extern":"1","language":[{"iso":"eng"}],"keyword":["Materials Science","Science & Technology - Other Topics","solid-state nmr","spectroscopy","catalysts","colloidal crystals","colloids","cross-linking","elastomeric opal films","emulsion polymerization","gamma-methacryloxypropyltrimethoxysilane","hybrid films","melt-shear organization","nanoparticles","particle","photons","polymers","processing","self-assembly","transition"]},{"title":"P-31-Solid-State NMR Characterization and Catalytic Hydrogenation Tests of Novel heterogenized Iridium-Catalysts","doi":"10.1515/zpch-2016-0837","date_updated":"2026-02-17T16:18:04Z","date_created":"2026-02-07T15:35:41Z","author":[{"id":"118165","full_name":"Gutmann, Torsten","last_name":"Gutmann","first_name":"Torsten"},{"first_name":"S.","last_name":"Alkhagani","full_name":"Alkhagani, S."},{"first_name":"N.","full_name":"Rothermel, N.","last_name":"Rothermel"},{"first_name":"H. H.","last_name":"Limbach","full_name":"Limbach, H. H."},{"last_name":"Breitzke","full_name":"Breitzke, H.","first_name":"H."},{"first_name":"G.","last_name":"Buntkowsky","full_name":"Buntkowsky, G."}],"volume":231,"year":"2017","citation":{"apa":"Gutmann, T., Alkhagani, S., Rothermel, N., Limbach, H. H., Breitzke, H., & Buntkowsky, G. (2017). P-31-Solid-State NMR Characterization and Catalytic Hydrogenation Tests of Novel heterogenized Iridium-Catalysts. Zeitschrift Fur Physikalische Chemie-International Journal of Research in Physical Chemistry & Chemical Physics, 231(3), 653–669. https://doi.org/10.1515/zpch-2016-0837","bibtex":"@article{Gutmann_Alkhagani_Rothermel_Limbach_Breitzke_Buntkowsky_2017, title={P-31-Solid-State NMR Characterization and Catalytic Hydrogenation Tests of Novel heterogenized Iridium-Catalysts}, volume={231}, DOI={10.1515/zpch-2016-0837}, number={3}, journal={Zeitschrift Fur Physikalische Chemie-International Journal of Research in Physical Chemistry & Chemical Physics}, author={Gutmann, Torsten and Alkhagani, S. and Rothermel, N. and Limbach, H. H. and Breitzke, H. and Buntkowsky, G.}, year={2017}, pages={653–669} }","mla":"Gutmann, Torsten, et al. “P-31-Solid-State NMR Characterization and Catalytic Hydrogenation Tests of Novel Heterogenized Iridium-Catalysts.” Zeitschrift Fur Physikalische Chemie-International Journal of Research in Physical Chemistry & Chemical Physics, vol. 231, no. 3, 2017, pp. 653–669, doi:10.1515/zpch-2016-0837.","short":"T. Gutmann, S. Alkhagani, N. Rothermel, H.H. Limbach, H. Breitzke, G. Buntkowsky, Zeitschrift Fur Physikalische Chemie-International Journal of Research in Physical Chemistry & Chemical Physics 231 (2017) 653–669.","chicago":"Gutmann, Torsten, S. Alkhagani, N. Rothermel, H. H. Limbach, H. Breitzke, and G. Buntkowsky. “P-31-Solid-State NMR Characterization and Catalytic Hydrogenation Tests of Novel Heterogenized Iridium-Catalysts.” Zeitschrift Fur Physikalische Chemie-International Journal of Research in Physical Chemistry & Chemical Physics 231, no. 3 (2017): 653–669. https://doi.org/10.1515/zpch-2016-0837.","ieee":"T. Gutmann, S. Alkhagani, N. Rothermel, H. H. Limbach, H. Breitzke, and G. Buntkowsky, “P-31-Solid-State NMR Characterization and Catalytic Hydrogenation Tests of Novel heterogenized Iridium-Catalysts,” Zeitschrift Fur Physikalische Chemie-International Journal of Research in Physical Chemistry & Chemical Physics, vol. 231, no. 3, pp. 653–669, 2017, doi: 10.1515/zpch-2016-0837.","ama":"Gutmann T, Alkhagani S, Rothermel N, Limbach HH, Breitzke H, Buntkowsky G. P-31-Solid-State NMR Characterization and Catalytic Hydrogenation Tests of Novel heterogenized Iridium-Catalysts. Zeitschrift Fur Physikalische Chemie-International Journal of Research in Physical Chemistry & Chemical Physics. 2017;231(3):653–669. doi:10.1515/zpch-2016-0837"},"page":"653–669","intvolume":" 231","publication_identifier":{"issn":["0942-9352"]},"issue":"3","keyword":["Chemistry","dynamic nuclear-polarization","solid-state nmr","DFT","heterogeneous catalysis","hydrido complexes","hydrogenation","immobilized catalyst","inorganic hybrid","iridium","materials","mesoporous","molecular-orbital methods","PHIP","phosphine complexes","reusable catalysts","silica","solid-state-NMR","wilkinsons catalyst"],"extern":"1","language":[{"iso":"eng"}],"_id":"63956","user_id":"100715","abstract":[{"text":"The synthesis of novel robust and stable iridium-based immobilized catalysts on silica-polymer hybrid materials (Si-PB-Ir) is described. These catalysts are characterized by a combination of 1D P-31 CP-MAS and 2D P-31-H-1 HETCOR and J-resolved multinuclear solid state NMR experiments. Different binding situations such as singly and multiply coordinated phosphines are identified. Density functional theory (DFT) calculations are performed to corroborate the interpretation of the experimental NMR data, in order to propose a structural model of the heterogenized catalysts. Finally, the catalytic activity of the Si-PB-Ir catalysts is investigated for the hydrogenation of styrene employing para-enriched hydrogen gas.","lang":"eng"}],"status":"public","type":"journal_article","publication":"Zeitschrift Fur Physikalische Chemie-International Journal of Research in Physical Chemistry & Chemical Physics"},{"language":[{"iso":"eng"}],"extern":"1","keyword":["al-27 nmr","characterization","Chemistry","cross-polarization","dynamic nuclear-polarization","eta-alumina","gamma-alumina","hydroxy fluorides","ions","Materials Science","pentacoordinated al3+","Science & Technology - Other Topics","solid-state nmr","spectroscopic","structural insights"],"user_id":"100715","_id":"63920","status":"public","abstract":[{"lang":"eng","text":"Coordinatively unsaturated sites (CUS) present a key feature of alumina based catalysts as they are believed to act as Lewis-acid sites in heterogeneously catalyzed reactions. In the present study, the direct observation of active species on a fluoride-doped aluminum oxide catalyst is demonstrated. This new fluoride-doped aluminum oxide exhibits strong Lewis-acid sites and superior catalytic activity as compared to gamma-Al2O3. To emphasize the labile state of Lewis-acid sites, two distinctive states of the catalysts surface are addressed using H-1-Al-27 cross polarization (CP) MAS NMR. On the one hand, the highly dehydrated and active state after calcination at 700 degrees C and on the other hand the rehydrated and catalytically inactive surface (produced by contact to air) are probed. These experiments revealed the presence of significant amounts of coordinatively unsaturated sites in the form of 4-and 5-fold coordinated Al-sites on the highly dehydrated surface. In contrast to this, the rehydrated sample exhibited a severely restructured surface caused by the chemisorption of H2O which is ’constituted in a manner that was proposed in earlier models for gamma-Al2O3 surfaces."}],"type":"journal_article","publication":"Journal of Physical Chemistry C","doi":"10.1021/acs.jpcc.7b02535","title":"Direct Observation of Coordinatively Unsaturated Sites on the Surface of a Fluoride-Doped Alumina Catalyst","date_created":"2026-02-07T08:56:18Z","author":[{"full_name":"Ahrem, L.","last_name":"Ahrem","first_name":"L."},{"last_name":"Scholz","full_name":"Scholz, G.","first_name":"G."},{"first_name":"Torsten","last_name":"Gutmann","full_name":"Gutmann, Torsten","id":"118165"},{"full_name":"Calvo, B.","last_name":"Calvo","first_name":"B."},{"last_name":"Buntkowsky","full_name":"Buntkowsky, G.","first_name":"G."},{"first_name":"E.","last_name":"Kemnitz","full_name":"Kemnitz, E."}],"volume":121,"date_updated":"2026-02-17T16:19:24Z","citation":{"chicago":"Ahrem, L., G. Scholz, Torsten Gutmann, B. Calvo, G. Buntkowsky, and E. Kemnitz. “Direct Observation of Coordinatively Unsaturated Sites on the Surface of a Fluoride-Doped Alumina Catalyst.” Journal of Physical Chemistry C 121, no. 22 (2017): 12206–12213. https://doi.org/10.1021/acs.jpcc.7b02535.","ieee":"L. Ahrem, G. Scholz, T. Gutmann, B. Calvo, G. Buntkowsky, and E. Kemnitz, “Direct Observation of Coordinatively Unsaturated Sites on the Surface of a Fluoride-Doped Alumina Catalyst,” Journal of Physical Chemistry C, vol. 121, no. 22, pp. 12206–12213, 2017, doi: 10.1021/acs.jpcc.7b02535.","ama":"Ahrem L, Scholz G, Gutmann T, Calvo B, Buntkowsky G, Kemnitz E. Direct Observation of Coordinatively Unsaturated Sites on the Surface of a Fluoride-Doped Alumina Catalyst. Journal of Physical Chemistry C. 2017;121(22):12206–12213. doi:10.1021/acs.jpcc.7b02535","apa":"Ahrem, L., Scholz, G., Gutmann, T., Calvo, B., Buntkowsky, G., & Kemnitz, E. (2017). Direct Observation of Coordinatively Unsaturated Sites on the Surface of a Fluoride-Doped Alumina Catalyst. Journal of Physical Chemistry C, 121(22), 12206–12213. https://doi.org/10.1021/acs.jpcc.7b02535","short":"L. Ahrem, G. Scholz, T. Gutmann, B. Calvo, G. Buntkowsky, E. Kemnitz, Journal of Physical Chemistry C 121 (2017) 12206–12213.","mla":"Ahrem, L., et al. “Direct Observation of Coordinatively Unsaturated Sites on the Surface of a Fluoride-Doped Alumina Catalyst.” Journal of Physical Chemistry C, vol. 121, no. 22, 2017, pp. 12206–12213, doi:10.1021/acs.jpcc.7b02535.","bibtex":"@article{Ahrem_Scholz_Gutmann_Calvo_Buntkowsky_Kemnitz_2017, title={Direct Observation of Coordinatively Unsaturated Sites on the Surface of a Fluoride-Doped Alumina Catalyst}, volume={121}, DOI={10.1021/acs.jpcc.7b02535}, number={22}, journal={Journal of Physical Chemistry C}, author={Ahrem, L. and Scholz, G. and Gutmann, Torsten and Calvo, B. and Buntkowsky, G. and Kemnitz, E.}, year={2017}, pages={12206–12213} }"},"intvolume":" 121","page":"12206–12213","year":"2017","issue":"22","publication_identifier":{"issn":["1932-7447"]}},{"publication":"Service-Oriented Computing","abstract":[{"text":"Integrating apps on mobile devices into applications running on other devices is usually difficult. For instance, using a messenger on a smartphone to share a text written on a desktop computer often ends up in a cumbersome solution to transfer the text, because many applications are not designed for such scenarios. In this paper, we present an approach enabling the integration of apps running on Android devices into applications running on other devices and even other platforms. This is achieved by specifying adapters for Android apps, which map their services to a platform-independent service interface. For this purpose, we have developed a domain-specific language to ease the specification of such mappings. Our approach is applicable without the need to modify the existing Android apps providing the service. We analyzed its feasibility by implementing our approach and by specifying mappings for several popular Android apps, e.g., phone book, camera, and file explorer.","lang":"eng"}],"keyword":["Cross-Device","Integration","Android","Adapter","DSL"],"language":[{"iso":"eng"}],"year":"2016","publisher":"Springer International Publishing","date_created":"2018-11-26T10:21:38Z","title":"Cross-Device Integration of Android Apps","type":"conference","editor":[{"last_name":"Sheng","full_name":"Sheng, Quan Z. ","first_name":"Quan Z. "},{"first_name":"Eleni ","last_name":"Stroulia","full_name":"Stroulia, Eleni "},{"last_name":"Tata","full_name":"Tata, Samir ","first_name":"Samir "},{"last_name":"Bhiri","full_name":"Bhiri, Sami ","first_name":"Sami "}],"status":"public","_id":"5825","department":[{"_id":"66"}],"user_id":"39928","publication_identifier":{"isbn":["9783319462943","9783319462950"],"issn":["0302-9743","1611-3349"]},"publication_status":"published","place":"Cham","page":"171-185","citation":{"apa":"Wolters, D., Kirchhoff, J., Gerth, C., & Engels, G. (2016). Cross-Device Integration of Android Apps. In Q. Z. Sheng, E. Stroulia, S. Tata, & S. Bhiri (Eds.), Service-Oriented Computing (pp. 171–185). Cham: Springer International Publishing. https://doi.org/10.1007/978-3-319-46295-0_11","bibtex":"@inproceedings{Wolters_Kirchhoff_Gerth_Engels_2016, place={Cham}, title={Cross-Device Integration of Android Apps}, DOI={10.1007/978-3-319-46295-0_11}, booktitle={Service-Oriented Computing}, publisher={Springer International Publishing}, author={Wolters, Dennis and Kirchhoff, Jonas and Gerth, Christian and Engels, Gregor}, editor={Sheng, Quan Z. and Stroulia, Eleni and Tata, Samir and Bhiri, Sami Editors}, year={2016}, pages={171–185} }","short":"D. Wolters, J. Kirchhoff, C. Gerth, G. Engels, in: Q.Z. Sheng, E. Stroulia, S. Tata, S. Bhiri (Eds.), Service-Oriented Computing, Springer International Publishing, Cham, 2016, pp. 171–185.","mla":"Wolters, Dennis, et al. “Cross-Device Integration of Android Apps.” Service-Oriented Computing, edited by Quan Z. Sheng et al., Springer International Publishing, 2016, pp. 171–85, doi:10.1007/978-3-319-46295-0_11.","ieee":"D. Wolters, J. Kirchhoff, C. Gerth, and G. Engels, “Cross-Device Integration of Android Apps,” in Service-Oriented Computing, 2016, pp. 171–185.","chicago":"Wolters, Dennis, Jonas Kirchhoff, Christian Gerth, and Gregor Engels. “Cross-Device Integration of Android Apps.” In Service-Oriented Computing, edited by Quan Z. Sheng, Eleni Stroulia, Samir Tata, and Sami Bhiri, 171–85. Cham: Springer International Publishing, 2016. https://doi.org/10.1007/978-3-319-46295-0_11.","ama":"Wolters D, Kirchhoff J, Gerth C, Engels G. Cross-Device Integration of Android Apps. In: Sheng QZ, Stroulia E, Tata S, Bhiri S, eds. Service-Oriented Computing. Cham: Springer International Publishing; 2016:171-185. doi:10.1007/978-3-319-46295-0_11"},"date_updated":"2022-01-06T07:02:43Z","author":[{"first_name":"Dennis","last_name":"Wolters","full_name":"Wolters, Dennis","id":"11308"},{"first_name":"Jonas","id":"39928","full_name":"Kirchhoff, Jonas","last_name":"Kirchhoff"},{"last_name":"Gerth","full_name":"Gerth, Christian","first_name":"Christian"},{"first_name":"Gregor","full_name":"Engels, Gregor","id":"107","last_name":"Engels"}],"doi":"10.1007/978-3-319-46295-0_11"},{"keyword":["Spin Polarization","Pump Pulse","Trion","Spin Component","Coherence Time"],"language":[{"iso":"eng"}],"publication":"Applied Physics B","abstract":[{"text":"Spins in semiconductor quantum dots have been considered as prospective quantum bit excitations. Their coupling to the crystal environment manifests itself in a limitation of the spin coherence times to the microsecond range, both for electron and hole spins. This rather short-lived coherence compared to atomic states asks for manipulations on timescales as short as possible. Due to the huge dipole moment for transitions between the valence and conduction band, pulsed laser systems offer the possibility to perform manipulations within picoseconds or even faster. Here, we report on results that show the potential of optical spin manipulations with currently available pulsed laser systems. Using picosecond laser pulses, we demonstrate optically induced spin rotations of electron and hole spins. We further realize the optical decoupling of the hole spins from the nuclear surrounding at the nanosecond timescales and demonstrate an all-optical spin tomography for interacting electron spin sub-ensembles.","lang":"eng"}],"publisher":"Springer Nature","date_created":"2018-08-29T08:35:10Z","title":"Advanced optical manipulation of carrier spins in (In,Ga)As quantum dots","issue":"1","year":"2016","_id":"4246","user_id":"16199","department":[{"_id":"15"},{"_id":"230"},{"_id":"35"},{"_id":"170"},{"_id":"293"},{"_id":"292"},{"_id":"35"},{"_id":"290"}],"article_type":"original","article_number":"17","type":"journal_article","status":"public","date_updated":"2025-12-16T16:44:01Z","author":[{"first_name":"S.","last_name":"Varwig","full_name":"Varwig, S."},{"first_name":"E.","full_name":"Evers, E.","last_name":"Evers"},{"last_name":"Greilich","full_name":"Greilich, A.","first_name":"A."},{"last_name":"Yakovlev","full_name":"Yakovlev, D. R.","first_name":"D. R."},{"first_name":"Dirk","id":"37763","full_name":"Reuter, Dirk","last_name":"Reuter"},{"full_name":"Wieck, A. D.","last_name":"Wieck","first_name":"A. D."},{"id":"344","full_name":"Meier, Torsten","last_name":"Meier","orcid":"0000-0001-8864-2072","first_name":"Torsten"},{"full_name":"Zrenner, Artur","id":"606","orcid":"0000-0002-5190-0944","last_name":"Zrenner","first_name":"Artur"},{"full_name":"Bayer, M.","last_name":"Bayer","first_name":"M."}],"volume":122,"doi":"10.1007/s00340-015-6274-y","publication_status":"published","publication_identifier":{"issn":["0946-2171","1432-0649"]},"citation":{"ama":"Varwig S, Evers E, Greilich A, et al. Advanced optical manipulation of carrier spins in (In,Ga)As quantum dots. Applied Physics B. 2016;122(1). doi:10.1007/s00340-015-6274-y","ieee":"S. Varwig et al., “Advanced optical manipulation of carrier spins in (In,Ga)As quantum dots,” Applied Physics B, vol. 122, no. 1, Art. no. 17, 2016, doi: 10.1007/s00340-015-6274-y.","chicago":"Varwig, S., E. Evers, A. Greilich, D. R. Yakovlev, Dirk Reuter, A. D. Wieck, Torsten Meier, Artur Zrenner, and M. Bayer. “Advanced Optical Manipulation of Carrier Spins in (In,Ga)As Quantum Dots.” Applied Physics B 122, no. 1 (2016). https://doi.org/10.1007/s00340-015-6274-y.","apa":"Varwig, S., Evers, E., Greilich, A., Yakovlev, D. R., Reuter, D., Wieck, A. D., Meier, T., Zrenner, A., & Bayer, M. (2016). Advanced optical manipulation of carrier spins in (In,Ga)As quantum dots. Applied Physics B, 122(1), Article 17. https://doi.org/10.1007/s00340-015-6274-y","short":"S. Varwig, E. Evers, A. Greilich, D.R. Yakovlev, D. Reuter, A.D. Wieck, T. Meier, A. Zrenner, M. Bayer, Applied Physics B 122 (2016).","bibtex":"@article{Varwig_Evers_Greilich_Yakovlev_Reuter_Wieck_Meier_Zrenner_Bayer_2016, title={Advanced optical manipulation of carrier spins in (In,Ga)As quantum dots}, volume={122}, DOI={10.1007/s00340-015-6274-y}, number={117}, journal={Applied Physics B}, publisher={Springer Nature}, author={Varwig, S. and Evers, E. and Greilich, A. and Yakovlev, D. R. and Reuter, Dirk and Wieck, A. D. and Meier, Torsten and Zrenner, Artur and Bayer, M.}, year={2016} }","mla":"Varwig, S., et al. “Advanced Optical Manipulation of Carrier Spins in (In,Ga)As Quantum Dots.” Applied Physics B, vol. 122, no. 1, 17, Springer Nature, 2016, doi:10.1007/s00340-015-6274-y."},"intvolume":" 122"},{"language":[{"iso":"eng"}],"extern":"1","keyword":["heterogeneous catalysis","immobilized catalyst","dynamic nuclear polarization","hyperpolarization","NMR spectroscopy"],"user_id":"100715","_id":"63963","status":"public","abstract":[{"lang":"eng","text":"A novel heterogeneous dirhodium catalyst has been synthesized. This stable catalyst is constructed from dirhodium acetate dimer (Rh2(OAc)4) units, which are covalently linked to amine- and carboxyl-bifunctionalized mesoporous silica (SBA-15NH2COOH). It shows good efficiency in catalyzing the cyclopropanation reaction of styrene and ethyl diazoacetate (EDA) forming cis- and trans-1-ethoxycarbonyl-2-phenylcyclopropane. To characterize the structure of this catalyst and to confirm the successful immobilization, heteronuclear solid-state NMR experiments have been performed. The high application potential of dynamic nuclear polarization (DNP) NMR for the analysis of binding sites in this novel catalyst is demonstrated. Signal-enhanced 13C CP MAS and 15N CP MAS techniques have been employed to detect different carboxyl and amine binding sites in natural abundance on a fast time scale. The interpretation of the experimental chemical shift values for different binding sites has been corroborated by quantum chemical calculations on dirhodium model complexes."}],"type":"journal_article","publication":"Chemistry A European Journal","doi":"10.1002/chem.201405043","title":"Natural Abundance 15N NMR by Dynamic Nuclear Polarization: Fast Analysis of Binding Sites of a Novel Amine-Carboxyl-Linked Immobilized Dirhodium Catalyst","author":[{"last_name":"Gutmann","full_name":"Gutmann, Torsten","id":"118165","first_name":"Torsten"},{"full_name":"Liu, Jiquan","last_name":"Liu","first_name":"Jiquan"},{"last_name":"Rothermel","full_name":"Rothermel, Niels","first_name":"Niels"},{"first_name":"Yeping","full_name":"Xu, Yeping","last_name":"Xu"},{"first_name":"Eva","full_name":"Jaumann, Eva","last_name":"Jaumann"},{"first_name":"Mayke","full_name":"Werner, Mayke","last_name":"Werner"},{"full_name":"Breitzke, Hergen","last_name":"Breitzke","first_name":"Hergen"},{"full_name":"Sigurdsson, Snorri T.","last_name":"Sigurdsson","first_name":"Snorri T."},{"full_name":"Buntkowsky, Gerd","last_name":"Buntkowsky","first_name":"Gerd"}],"date_created":"2026-02-07T15:38:07Z","volume":21,"date_updated":"2026-02-17T16:17:50Z","publisher":"WILEY-VCH Verlag","citation":{"bibtex":"@article{Gutmann_Liu_Rothermel_Xu_Jaumann_Werner_Breitzke_Sigurdsson_Buntkowsky_2015, title={Natural Abundance 15N NMR by Dynamic Nuclear Polarization: Fast Analysis of Binding Sites of a Novel Amine-Carboxyl-Linked Immobilized Dirhodium Catalyst}, volume={21}, DOI={10.1002/chem.201405043}, number={9}, journal={Chemistry A European Journal}, publisher={WILEY-VCH Verlag}, author={Gutmann, Torsten and Liu, Jiquan and Rothermel, Niels and Xu, Yeping and Jaumann, Eva and Werner, Mayke and Breitzke, Hergen and Sigurdsson, Snorri T. and Buntkowsky, Gerd}, year={2015}, pages={3798–3805} }","mla":"Gutmann, Torsten, et al. “Natural Abundance 15N NMR by Dynamic Nuclear Polarization: Fast Analysis of Binding Sites of a Novel Amine-Carboxyl-Linked Immobilized Dirhodium Catalyst.” Chemistry A European Journal, vol. 21, no. 9, WILEY-VCH Verlag, 2015, pp. 3798–3805, doi:10.1002/chem.201405043.","short":"T. Gutmann, J. Liu, N. Rothermel, Y. Xu, E. Jaumann, M. Werner, H. Breitzke, S.T. Sigurdsson, G. Buntkowsky, Chemistry A European Journal 21 (2015) 3798–3805.","apa":"Gutmann, T., Liu, J., Rothermel, N., Xu, Y., Jaumann, E., Werner, M., Breitzke, H., Sigurdsson, S. T., & Buntkowsky, G. (2015). Natural Abundance 15N NMR by Dynamic Nuclear Polarization: Fast Analysis of Binding Sites of a Novel Amine-Carboxyl-Linked Immobilized Dirhodium Catalyst. Chemistry A European Journal, 21(9), 3798–3805. https://doi.org/10.1002/chem.201405043","ieee":"T. Gutmann et al., “Natural Abundance 15N NMR by Dynamic Nuclear Polarization: Fast Analysis of Binding Sites of a Novel Amine-Carboxyl-Linked Immobilized Dirhodium Catalyst,” Chemistry A European Journal, vol. 21, no. 9, pp. 3798–3805, 2015, doi: 10.1002/chem.201405043.","chicago":"Gutmann, Torsten, Jiquan Liu, Niels Rothermel, Yeping Xu, Eva Jaumann, Mayke Werner, Hergen Breitzke, Snorri T. Sigurdsson, and Gerd Buntkowsky. “Natural Abundance 15N NMR by Dynamic Nuclear Polarization: Fast Analysis of Binding Sites of a Novel Amine-Carboxyl-Linked Immobilized Dirhodium Catalyst.” Chemistry A European Journal 21, no. 9 (2015): 3798–3805. https://doi.org/10.1002/chem.201405043.","ama":"Gutmann T, Liu J, Rothermel N, et al. Natural Abundance 15N NMR by Dynamic Nuclear Polarization: Fast Analysis of Binding Sites of a Novel Amine-Carboxyl-Linked Immobilized Dirhodium Catalyst. Chemistry A European Journal. 2015;21(9):3798–3805. doi:10.1002/chem.201405043"},"intvolume":" 21","page":"3798–3805","year":"2015","issue":"9"},{"volume":7,"author":[{"last_name":"Herzog","full_name":"Herzog, Michael","first_name":"Michael"},{"last_name":"Trier","id":"72744","full_name":"Trier, Matthias","first_name":"Matthias"}],"date_created":"2019-09-19T10:01:17Z","date_updated":"2022-01-06T06:51:32Z","title":"MEDIA ENGINEERING WITH A CONTENT HUB SYSTEM. GENERIC CONTENT TRANSFORMATION FOR MOBILE MEDIA","issue":"2","publication_identifier":{"issn":["2312-5381"]},"intvolume":" 7","page":"108-115","citation":{"ieee":"M. Herzog and M. Trier, “MEDIA ENGINEERING WITH A CONTENT HUB SYSTEM. GENERIC CONTENT TRANSFORMATION FOR MOBILE MEDIA,” International Journal of Computing, vol. 7, no. 2, pp. 108–115, 2014.","chicago":"Herzog, Michael, and Matthias Trier. “MEDIA ENGINEERING WITH A CONTENT HUB SYSTEM. GENERIC CONTENT TRANSFORMATION FOR MOBILE MEDIA.” International Journal of Computing 7, no. 2 (2014): 108–15.","ama":"Herzog M, Trier M. MEDIA ENGINEERING WITH A CONTENT HUB SYSTEM. GENERIC CONTENT TRANSFORMATION FOR MOBILE MEDIA. International Journal of Computing. 2014;7(2):108-115.","bibtex":"@article{Herzog_Trier_2014, title={MEDIA ENGINEERING WITH A CONTENT HUB SYSTEM. GENERIC CONTENT TRANSFORMATION FOR MOBILE MEDIA}, volume={7}, number={2}, journal={International Journal of Computing}, author={Herzog, Michael and Trier, Matthias}, year={2014}, pages={108–115} }","mla":"Herzog, Michael, and Matthias Trier. “MEDIA ENGINEERING WITH A CONTENT HUB SYSTEM. GENERIC CONTENT TRANSFORMATION FOR MOBILE MEDIA.” International Journal of Computing, vol. 7, no. 2, 2014, pp. 108–15.","short":"M. Herzog, M. Trier, International Journal of Computing 7 (2014) 108–115.","apa":"Herzog, M., & Trier, M. (2014). MEDIA ENGINEERING WITH A CONTENT HUB SYSTEM. GENERIC CONTENT TRANSFORMATION FOR MOBILE MEDIA. International Journal of Computing, 7(2), 108–115."},"year":"2014","department":[{"_id":"198"}],"user_id":"62809","_id":"13304","language":[{"iso":"eng"}],"keyword":["Multimedia Authoring","Mobile Content","Cross Media Production","Content Engineering","Media Retrieval"],"publication":"International Journal of Computing","type":"journal_article","status":"public","abstract":[{"text":"A primary problem in multimedia content production is the plethora of formats and the resulting multiple point-to-point transformation processes in different content formatting specifications. However, these content transformation processes can be conceptually broken down into a limited set of abstract principles. This allows a unified approach that theoretically enables the transformation of any given input channel into any desired output. Based on this principle, the present article introduces the concept of Generic Content Transformation and the related project MOCCA, which develops the corresponding software implementation of generic content transformation for a variety of input and output channels. To balance technical similarities with specific properties of different media channels, we suggest a combination of an XML-based structure (MocML) and a high level authoring environment. Generic Content Transformation further allows for novel means of accessing assets via compound search algorithms. In the second part we summarize and discuss current results and experiences in three scenarios of media production, including mobile media.","lang":"eng"}]},{"title":"The Relevance of Biases in Management Forecasts for Failure Prediction in Venture Capital Investments","doi":"10.2139/ssrn.2100501","main_file_link":[{"url":"https://papers.ssrn.com/sol3/papers.cfm?abstract_id=2100501"}],"date_updated":"2022-01-06T06:54:41Z","date_created":"2021-01-05T11:59:50Z","author":[{"first_name":"Sönke","full_name":"Sievers, Sönke","id":"46447","last_name":"Sievers"},{"last_name":"Mokwa","full_name":"Mokwa, Christopher Frederik","first_name":"Christopher Frederik"}],"year":"2012","page":"31","jel":["G24","G32","M13","M41"],"citation":{"ieee":"S. Sievers and C. F. Mokwa, The Relevance of Biases in Management Forecasts for Failure Prediction in Venture Capital Investments. 2012.","chicago":"Sievers, Sönke, and Christopher Frederik Mokwa. The Relevance of Biases in Management Forecasts for Failure Prediction in Venture Capital Investments, 2012. https://doi.org/10.2139/ssrn.2100501.","ama":"Sievers S, Mokwa CF. The Relevance of Biases in Management Forecasts for Failure Prediction in Venture Capital Investments.; 2012. doi:10.2139/ssrn.2100501","bibtex":"@book{Sievers_Mokwa_2012, title={The Relevance of Biases in Management Forecasts for Failure Prediction in Venture Capital Investments}, DOI={10.2139/ssrn.2100501}, author={Sievers, Sönke and Mokwa, Christopher Frederik}, year={2012} }","short":"S. Sievers, C.F. Mokwa, The Relevance of Biases in Management Forecasts for Failure Prediction in Venture Capital Investments, 2012.","mla":"Sievers, Sönke, and Christopher Frederik Mokwa. The Relevance of Biases in Management Forecasts for Failure Prediction in Venture Capital Investments. 2012, doi:10.2139/ssrn.2100501.","apa":"Sievers, S., & Mokwa, C. F. (2012). The Relevance of Biases in Management Forecasts for Failure Prediction in Venture Capital Investments. https://doi.org/10.2139/ssrn.2100501"},"publication_status":"published","keyword":["Management forecast biases","cross-sectional projection models","venture-backed start-ups","failure prediction","overoptimism","overconfidence"],"language":[{"iso":"eng"}],"extern":"1","_id":"20870","department":[{"_id":"275"}],"user_id":"46447","abstract":[{"text":"This study shows how venture capital investors can identify potential biases in multi-year management forecasts before an investment decision and derive significantly more accurate failure predictions. By advancing a cross-sectional projection method developed by prior research and using firm-specific information in financial statements and business plans, we derive benchmarks for management revenue forecasts. With these benchmarks, we estimate forecast errors as an a priori measure of biased expectations. Using this measure for our proprietary dataset on venture-backed start-ups in Germany, we find evidence of substantial upward forecast biases. We uncover that firms with large forecast errors fail significantly more often than do less biased entrepreneurs in years following the investment. Overall, our results highlight the implications of excessive optimism and overconfidence in entrepreneurial environments and emphasize the relevance of accounting information and business plans for venture capital investment decisions.","lang":"eng"}],"status":"public","type":"working_paper"}]