[{"citation":{"mla":"Hadjiali, S., et al. “Substituent Influences on the NMR Signal Amplification of Ir Complexes with Heterocyclic Carbene Ligands.” <i>Applied Magnetic Resonance</i>, vol. 50, no. 7, 2019, pp. 895–902, doi:<a href=\"https://doi.org/10.1007/s00723-019-01115-x\">10.1007/s00723-019-01115-x</a>.","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.","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={<a href=\"https://doi.org/10.1007/s00723-019-01115-x\">10.1007/s00723-019-01115-x</a>}, 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., &#38; Buntkowsky, G. (2019). Substituent Influences on the NMR Signal Amplification of Ir Complexes with Heterocyclic Carbene Ligands. <i>Applied Magnetic Resonance</i>, <i>50</i>(7), 895–902. <a href=\"https://doi.org/10.1007/s00723-019-01115-x\">https://doi.org/10.1007/s00723-019-01115-x</a>","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.” <i>Applied Magnetic Resonance</i> 50, no. 7 (2019): 895–902. <a href=\"https://doi.org/10.1007/s00723-019-01115-x\">https://doi.org/10.1007/s00723-019-01115-x</a>.","ieee":"S. Hadjiali <i>et al.</i>, “Substituent Influences on the NMR Signal Amplification of Ir Complexes with Heterocyclic Carbene Ligands,” <i>Applied Magnetic Resonance</i>, vol. 50, no. 7, pp. 895–902, 2019, doi: <a href=\"https://doi.org/10.1007/s00723-019-01115-x\">10.1007/s00723-019-01115-x</a>.","ama":"Hadjiali S, Savka R, Plaumann M, et al. Substituent Influences on the NMR Signal Amplification of Ir Complexes with Heterocyclic Carbene Ligands. <i>Applied Magnetic Resonance</i>. 2019;50(7):895–902. doi:<a href=\"https://doi.org/10.1007/s00723-019-01115-x\">10.1007/s00723-019-01115-x</a>"},"intvolume":"        50","page":"895–902","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","date_created":"2026-02-07T15:40:18Z","author":[{"first_name":"S.","full_name":"Hadjiali, S.","last_name":"Hadjiali"},{"first_name":"R.","full_name":"Savka, R.","last_name":"Savka"},{"first_name":"M.","full_name":"Plaumann, M.","last_name":"Plaumann"},{"full_name":"Bommerich, U.","last_name":"Bommerich","first_name":"U."},{"first_name":"S.","full_name":"Bothe, S.","last_name":"Bothe"},{"full_name":"Gutmann, Torsten","id":"118165","last_name":"Gutmann","first_name":"Torsten"},{"last_name":"Ratajczyk","full_name":"Ratajczyk, T.","first_name":"T."},{"first_name":"J.","full_name":"Bernarding, J.","last_name":"Bernarding"},{"first_name":"H. H.","last_name":"Limbach","full_name":"Limbach, H. H."},{"first_name":"H.","last_name":"Plenio","full_name":"Plenio, H."},{"last_name":"Buntkowsky","full_name":"Buntkowsky, G.","first_name":"G."}],"volume":50,"date_updated":"2026-02-17T16:17:34Z","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."}],"type":"journal_article","publication":"Applied Magnetic Resonance","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"},{"keyword":["heterogeneous catalysis","immobilized catalyst","dynamic nuclear polarization","hyperpolarization","NMR spectroscopy"],"extern":"1","language":[{"iso":"eng"}],"_id":"63963","user_id":"100715","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."}],"status":"public","publication":"Chemistry A European Journal","type":"journal_article","title":"Natural Abundance 15N NMR by Dynamic Nuclear Polarization: Fast Analysis of Binding Sites of a Novel Amine-Carboxyl-Linked Immobilized Dirhodium Catalyst","doi":"10.1002/chem.201405043","date_updated":"2026-02-17T16:17:50Z","publisher":"WILEY-VCH Verlag","volume":21,"author":[{"first_name":"Torsten","last_name":"Gutmann","full_name":"Gutmann, Torsten","id":"118165"},{"full_name":"Liu, Jiquan","last_name":"Liu","first_name":"Jiquan"},{"first_name":"Niels","last_name":"Rothermel","full_name":"Rothermel, Niels"},{"full_name":"Xu, Yeping","last_name":"Xu","first_name":"Yeping"},{"last_name":"Jaumann","full_name":"Jaumann, Eva","first_name":"Eva"},{"full_name":"Werner, Mayke","last_name":"Werner","first_name":"Mayke"},{"first_name":"Hergen","last_name":"Breitzke","full_name":"Breitzke, Hergen"},{"last_name":"Sigurdsson","full_name":"Sigurdsson, Snorri T.","first_name":"Snorri T."},{"first_name":"Gerd","full_name":"Buntkowsky, Gerd","last_name":"Buntkowsky"}],"date_created":"2026-02-07T15:38:07Z","year":"2015","intvolume":"        21","page":"3798–3805","citation":{"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.” <i>Chemistry A European Journal</i> 21, no. 9 (2015): 3798–3805. <a href=\"https://doi.org/10.1002/chem.201405043\">https://doi.org/10.1002/chem.201405043</a>.","ieee":"T. Gutmann <i>et al.</i>, “Natural Abundance 15N NMR by Dynamic Nuclear Polarization: Fast Analysis of Binding Sites of a Novel Amine-Carboxyl-Linked Immobilized Dirhodium Catalyst,” <i>Chemistry A European Journal</i>, vol. 21, no. 9, pp. 3798–3805, 2015, doi: <a href=\"https://doi.org/10.1002/chem.201405043\">10.1002/chem.201405043</a>.","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. <i>Chemistry A European Journal</i>. 2015;21(9):3798–3805. doi:<a href=\"https://doi.org/10.1002/chem.201405043\">10.1002/chem.201405043</a>","apa":"Gutmann, T., Liu, J., Rothermel, N., Xu, Y., Jaumann, E., Werner, M., Breitzke, H., Sigurdsson, S. T., &#38; 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. <i>Chemistry A European Journal</i>, <i>21</i>(9), 3798–3805. <a href=\"https://doi.org/10.1002/chem.201405043\">https://doi.org/10.1002/chem.201405043</a>","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.” <i>Chemistry A European Journal</i>, vol. 21, no. 9, WILEY-VCH Verlag, 2015, pp. 3798–3805, doi:<a href=\"https://doi.org/10.1002/chem.201405043\">10.1002/chem.201405043</a>.","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.","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={<a href=\"https://doi.org/10.1002/chem.201405043\">10.1002/chem.201405043</a>}, 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} }"},"issue":"9"}]