@inbook{60909, author = {{Freitag, Christine}}, booktitle = {{Wissenschaftsdidaktik als kritische Kommunikationsanalyse. Ein Sammelband zur Weiterführung eines Gedankens von Ludwig Huber}}, editor = {{Scharlau, Ingrid and Jenert, Tobias}}, isbn = {{978-3-8474-3070-4 }}, pages = {{181--189}}, title = {{{Vermittlungshorizonte. Erziehungswissenschaftliche Reflexionen über hochschul- und wissenschaftsdidaktische Herausforderungen}}}, doi = {{10.3224/84743070}}, year = {{2024}}, } @inbook{57154, author = {{Asiimwe, Henry and Bode, Henrik and Bogere, Paul and Freitag, Christine and Mangeni, Teddy}}, booktitle = {{Bildungsmedien für Erwachsene Educational Media for Adults }}, editor = {{Andrzejewska, Ewa and Matthes, Eva and Schütze, Sylvia and Van Wiele, Jan}}, isbn = {{978-3-7815-2670-9}}, pages = {{(pp. 245–255)}}, publisher = {{Verlag Julius Klinkhardt}}, title = {{{Which Media for Whom? The Implementation of Microgrids as a Trigger of Transformational Adult Learning Opportunities in Formal, Informal and Situational Settings in Times of Change}}}, doi = {{10.35468/6126}}, year = {{2024}}, } @inbook{49545, author = {{Freitag, Christine and Thiem, Annegret}}, booktitle = {{(Un)verfügbar - Kulturen des Heiligen}}, editor = {{Egidi, Margreth and Peters, Ludmila and Schmidt, Jochen}}, isbn = {{978-3-8376-6611-3}}, pages = {{253--272}}, publisher = {{University Press}}, title = {{{Transformation durch Vermittlung. Das Heilige in der Geschichte pädagogischen und literarischen Wirkens der Jesuiten in Lateinamerika }}}, year = {{2024}}, } @inbook{60025, author = {{Vochatzer, Stefanie}}, booktitle = {{»Debattieren, Opponieren, Protestieren – Interdisziplinäre Perspektiven auf sprachliche Praktiken des Widersprechens«}}, editor = {{Berlage, Lara and Engelken, Julian and Ernst, Peter and Hensellek, Jan and Herford, Lara and Hypius, Luois and Poghosyan, Sargis and Schellin, Angelina and Schmalwieser, Susanne Sophie and Warnke , Ingo H. }}, pages = {{58–65}}, publisher = {{OpenAccess U Bremen}}, title = {{{Der Briefroman als Medi­um weiblicher Kritik in der Aufklärung – Einblicke in Caroline Rudolphis »Gemälde weiblicher Erziehung«}}}, doi = {{10.26092/ELIB/3136}}, year = {{2024}}, } @inproceedings{64104, author = {{Scheideler, Christian and Hinnenthal , Kristian and Liedtke, David Jan}}, title = {{{Efficient Shape Formation by 3D Hybrid Programmable Matter: An Algorithm for Low Diameter Intermediate Structures. SAND 2024: 15:1-15:20}}}, year = {{2024}}, } @inproceedings{64103, author = {{Scheideler, Christian and Padalkin, Andreas}}, pages = {{65 -- 75}}, title = {{{Polylogarithmic Time Algorithms for Shortest Path Forests in Programmable Matter. }}}, year = {{2024}}, } @inproceedings{64106, author = {{Scheideler, Christian and Kostitsyna, Irina and Liedtke, David Jan}}, title = {{{Universal Coating by 3D Hybrid Programmable Matter.}}}, year = {{2024}}, } @article{64100, author = {{Scheideler, Christian and Padalkin, Andreas and Warner, Daniel}}, journal = {{The structural power of reconfigurable circuits in the amoebot model. Nat. Comput. 23(4): 603-625 (2024)}}, pages = {{603 -- 625}}, title = {{{The structural power of reconfigurable circuits in the amoebot model. }}}, year = {{2024}}, } @article{64101, author = {{Scheideler, Christian and Coy, Sam and Czumaj, Arthur and Schneider, Philipp and Werthmann, Julian}}, journal = {{Routing schemes for hybrid communication networks. Theor. Comput. Sci. 985: 114352 (2024)}}, title = {{{Routing schemes for hybrid communication networks. }}}, year = {{2024}}, } @inproceedings{64102, author = {{Scheideler, Christian and Dou, Jinfeng}}, publisher = {{ApPLIED@PODC 2024}}, title = {{{Invited Paper: Blockchains made Lightweight: A Median Rule for State Machine Replication. }}}, year = {{2024}}, } @inproceedings{64105, author = {{Scheideler, Christian and Padalkin, Andreas and Kumar , Manish }}, title = {{{Reconfiguration and Locomotion with Joint Movements in the Amoebot Model. }}}, year = {{2024}}, } @inproceedings{59337, abstract = {{Im Rahmen der Fortbildungsinitiative QuaMath beschäftige ich mich mit der Entwicklung von Fortbildungsaktivitäten für den Inhaltsbereich der analytischen Geometrie. Um dies zu realisieren, stellt sich zunächst die Frage: Über welche Expertise verfügen (angehende) Lehrkräfte zum verstehensorientierten Unterrichten von anaGeo.? Dazu spezifiziere ich ein gegenstandsbezogenes Expertisemodell (Prediger) für den Unterricht zur anaGeo., erhebe Vorwissen von (angehenden) Lehrkräften und erprobe Aus- und Fortbildungsaktivitäten in verschiedenen Stichproben zur Rekonstruktion von Orientierungen.}}, author = {{Herrmann, Janine}}, booktitle = {{Beiträge zum Mathematikunterricht 2024}}, keywords = {{Mathematikfortbildungen, analytische Geometrie, Expertise}}, location = {{Duisburg/Essen}}, publisher = {{LibreCat University}}, title = {{{Ansprüche an eine Fortbildung zur analytischen Geometrie}}}, year = {{2024}}, } @inproceedings{58228, author = {{Vernholz, Mats and Jonas-Ahrend, Gabriela}}, location = {{Halle (an der Saale)}}, title = {{{„Und ich sag mal, Theorie und Praxis ist zweierlei” – Wie können Praxisphasen Lehramtsstudierende auf zukünftige Anforderungen vorbereiten?}}}, year = {{2024}}, } @article{64063, abstract = {{Sodium batteries are an attractive alternative for future energy storage as they can be produced with abundant and low-cost materials. Nonetheless, sodium-ion batteries (SIBs) are often composed of flammable and volatile carbonate-based liquid electrolytes. Polymer electrolytes have attracted significant attention as safer alternatives. Among polymer electrolytes, single-ion conductive polymer electrolytes (SIPEs) are considered particularly interesting because they can suppress dendrite growth, enabling high-performance (quasi)-solid-state sodium–(metal) batteries. In this work, a self-standing, flexible, quasi-solid-state SIPE is investigated, which is composed of sodium 4-styrene sulfonyl (trifluoromethanesulfonyl) imide (NaSTFSI), pentaerythritol tetrakis(3-mercaptopropionate) (PETMP) and pentaerythritol tetraacrylate (PET4A) blended with poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP). The SIPE membrane, including 50 wt% of molecular transporter, exhibits ionic conductivity of 1.4 × 10−5 S cm−1 and 1.3 × 10−4 S cm−1 at 20 °C and 90 °C, respectively, thermal stability up to 280 °C, electrochemical stability window up to 4.5 V vs. Na/Na+, and Na plating/stripping reversibility in symmetric Na‖Na cells. The manufactured SIPE implemented in Prussian White (PW)‖Na cells enables the delivery of 147 mA h g−1 of PW at 15 mA g−1 with a Coulombic efficiency of over 99%, which is comparable with the PW‖Na cells using liquid carbonate electrolyte, confirming the suitability of the designed SIPE for sodium–(metal) batteries.}}, author = {{Wunder, Clemens and Lai, Thanh-Loan and Šić, Edina and Gutmann, Torsten and Vito, Eric and Buntkowsky, Gerd and Zarrabeitia, Maider and Passerini, Stefano}}, journal = {{Journal of Materials Chemistry A}}, number = {{32}}, pages = {{20935–20946}}, publisher = {{The Royal Society of Chemistry}}, title = {{{Sodium 4-styrenesulfonyl(trifluoromethanesulfonyl)imide-based single-ion conducting polymer electrolyte incorporating molecular transporters for quasi-solid-state sodium batteries}}}, doi = {{10.1039/D4TA02329C}}, volume = {{12}}, year = {{2024}}, } @article{64062, abstract = {{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.}}, 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 Buntkowsky, Gerd and Gutmann, Torsten}}, issn = {{1867-3880}}, journal = {{ChemCatChem}}, keywords = {{SBA-15, Heterogeneous catalyst, Pd cross-coupling, Polyethylene glycol, Solid-state DNP NMR}}, pages = {{e202401511}}, publisher = {{John Wiley & Sons, Ltd}}, title = {{{Novel Heterogeneous Pd Catalysts for Cross-Coupling Reactions in Biocompatible Media: Structural Insights from Solid-State NMR Techniques}}}, doi = {{10.1002/cctc.202401511}}, volume = {{17}}, year = {{2024}}, } @article{64043, abstract = {{In this study, electrochemical processes in a Li{\textbar}LiPF6{\textbar}LFP cell have been explored applying advanced solid-state NMR technologies. In situ solid-state NMR allows to monitor structural changes in local environments in commercially available cell components during galvanostatic cycling. In collaboration with Dragonfly Energy, ePROBE GmbH and Bruker BioSpin GmbH & Co. KG, we have demonstrated an experimental procedure for routine application of in situ solid-state NMR for battery research. This points out the high potential of this approach for use in the energy storage industry.}}, author = {{Šić, Edina and Fredericks, Dominion and Pecher, Oliver and Wegner, Sebastian and Breitzke, Hergen and Singh, Vickram and Buntkowsky, Gerd and Gutmann, Torsten}}, issn = {{1613-7507}}, journal = {{Applied Magnetic Resonance}}, number = {{55}}, pages = {{575–583}}, title = {{{Towards Routine 7Li In Situ Solid-State NMR Studies of Electrochemical Processes in Li\textbarLiPF6\textbarLFP Cells}}}, doi = {{10.1007/s00723-024-01643-1}}, year = {{2024}}, } @article{64017, abstract = {{Abstract Donor stabilization of Sn(II) and Pb(II) halides with 1,1?-ferrocenylene bridged bisphosphanes has been explored for Fe(C5H4P(C6H5)2)2 (dppf), and Fe(C5H4PH(C4H9))2. These bisphosphanes are reacted with SnBr2 and PbCl2 with and without additional Lewis acid (AlCl3) forming acyclic and cyclic donor adducts from which the latter represent bisphosphoniotetrylenes. Since dynamic exchange in solution is observed, characterization includes solution and solid-state NMR in addition to SC-XRD, amended by DFT calculations.}}, author = {{Nasemann, Sina and Franz, Roman and Kargin, Denis and Bruhn, Clemens and Kelemen, Zsolt and Gutmann, Torsten and Pietschnig, Rudolf}}, journal = {{Chemistry - An Asian Journal}}, keywords = {{ferrocene, lead, phosphorus, tetrylene, tin}}, number = {{8}}, pages = {{e202300950}}, publisher = {{John Wiley & Sons, Ltd}}, title = {{{At the limits of bisphosphonio-substituted stannylenes}}}, doi = {{10.1002/asia.202300950}}, volume = {{19}}, year = {{2024}}, } @article{64020, abstract = {{Porous organic polymers enable a novel approach to incorporate xantphos into a solid macroligand. Immobilizing a ruthenium complex on the xantphos framework results in an excellent catalyst for the hydrogenation of CO2 to formic acid. Recycling experiments indicate a minor partial degradation of the heterogenous catalyst after a certain induction period, which is referred to its structural changes.}}, author = {{Nisters, Arne and Gutmann, Torsten and Kim, Sun-Myung and Hofmann, Jan Philipp and Rose, Marcus}}, journal = {{RSC Sustainability}}, number = {{8}}, pages = {{2213–2217}}, publisher = {{RSC}}, title = {{{A solid xantphos macroligand based on porous organic polymers for the catalytic hydrogenation of CO2}}}, doi = {{10.1039/D4SU00164H}}, volume = {{2}}, year = {{2024}}, } @article{64002, abstract = {{The production of formaldehyde on industrial scale requires huge amounts of energy due to the involvement of reforming processes in combination with the demand in the megaton scale. Hence, a direct route for the transformation of (bio)methane to formaldehyde would decrease costs and puts less pressure on the environment. Herein, we report on the use of zinc modified silicas as possible support materials for vanadium catalysts and the resulting consequences for the performance in the selective oxidation of methane to formaldehyde. After optimization of the Zn content and reaction conditions, a remarkably high space-time yield of 12.4 kgCH2O·kgcat−1·h−1 was achieved. As a result of the extensive characterization by means of UV–vis, Raman, XANES and NMR spectroscopy it was found that vanadium is in the vicinity of highly dispersed zinc atoms which promote the formation of active vanadium species as supposed by theoretical calculations. This work presents a further step of catalyst development towards direct industrial methane conversion which may help to overcome current limitations in the future.}}, author = {{Kunkel, Benny and Seeburg, Dominik and Kabelitz, Anke and Witte, Steffen and Gutmann, Torsten and Breitzke, Hergen and Buntkowsky, Gerd and Buzanich, Ana Guilherme and Wohlrab, Sebastian}}, journal = {{Catalysis Today}}, keywords = {{Formaldehyde, Local coordination, SBA-15, Vanadium oxo species, XANES, Zinc doped silica}}, pages = {{114643}}, title = {{{Highly productive V/Zn-SiO2 catalysts for the selective oxidation of methane}}}, doi = {{10.1016/j.cattod.2024.114643}}, volume = {{432}}, year = {{2024}}, } @article{63989, abstract = {{We introduce the first mechanochemical cyclotrimerization of nitriles, a facile strategy for synthesizing triazine-containing molecules and materials, overcoming challenges related to carbonization and solubility. Conducting this solid-state approach in a mixer ball mill with 4-Methylbenzonitrile, we synthesize Tris(4-methylphenyl)-1,3,5-triazine quantitatively in as little as 90 minutes. Just as fast, this mechanochemical method facilitates the synthesis of the covalent triazine framework CTF-1 using 1,4 Dicyanobenzene. Material characterization confirms its porous (650 m2 g-1) and crystalline nature. Adjusting the induced mechanical energy allows control over the obtained stacking conformation of the resulting CTFs - from a staggered AB arrangement to an eclipsed AA stacking conformation. Finally, a substrate scope demonstrates the versatility of this approach, successfully yielding various CTFs. This work presents, for the first time, the mechanochemical cyclotrimerization of nitriles. Utilizing Trifluoromethanesulfonic acid and a ball mill, both small molecules and large organic frameworks could be obtained. Screening the reaction of 1,4-Dicyanobenzene by various parameters, such as reaction time, frequency, or temperature, significant impacts on the porosity of the polymer and its crystallinity were revealed. image}}, author = {{Hutsch, S. and Leonard, A. and Grätz, S. and Höfler, M. V. and Gutmann, Torsten and Borchardt, L.}}, issn = {{1433-7851}}, journal = {{Angewandte Chemie-International Edition}}, title = {{{Mechanochemical Cyclotrimerization: A Versatile Tool to Covalent Organic Frameworks with Tunable Stacking Mode}}}, doi = {{10.1002/anie.202403649}}, year = {{2024}}, }