TY - JOUR AB - Metal-catalyzed C−H activations are environmentally and economically attractive synthetic strategies for the construction of functional molecules as they obviate the need for pre-functionalized substrates and minimize waste generation. Great challenges reside in the control of selectivities, the utilization of unbiased hydrocarbons, and the operation of atom-economical dehydrocoupling mechanisms. An especially mild borylation of benzylic CH bonds was developed with the ligand-free pre-catalyst Co[N(SiMe3)2]2 and the bench-stable and inexpensive borylation reagent B2pin2 that produces H2 as the only by-product. A full set of kinetic, spectroscopic, and preparative mechanistic studies are indicative of a tandem catalysis mechanism of CH-borylation and dehydrocoupling via molecular CoI catalysts. AU - Ghosh, Pradip AU - Schoch, Roland AU - Bauer, Matthias AU - Jacobi von Wangelin, Axel ID - 41000 IS - 1 JF - Angewandte Chemie International Edition KW - General Chemistry KW - Catalysis SN - 1433-7851 TI - Selective Benzylic CH‐Borylations by Tandem Cobalt Catalysis VL - 61 ER - TY - JOUR AB - Within this article, it is shown that an electrochemical defluorination and additional fluorination of Ruddlesden–Popper-type La2NiO3F2 is possible within all-solid-state fluoride-ion batteries. Structural changes within the reduced and oxidized phases have been examined by X-ray diffraction studies at different states of charging and discharging. The synthesis of the oxidized phase La2NiO3F2+x proved to be successful by structural analysis using both X-ray powder diffraction and automated electron diffraction tomography techniques. The structural reversibility on re-fluorinating and re-defluorinating is also demonstrated. Moreover, the influence of different sequences of consecutive reduction and oxidation steps on the formed phases has been investigated. The observed structural changes have been compared to changes in phases obtained via other topochemical modification approaches such as hydride-based reduction and oxidative fluorination using F2 gas, highlighting the potential of such electrochemical reactions as alternative synthesis routes. Furthermore, the electrochemical routes represent safe and controllable synthesis approaches for novel phases, which cannot be synthesized via other topochemical methods. Additionally, side reactions, occurring alongside the desired electrochemical reactions, have been addressed and the cycling performance has been studied. AU - Wissel, Kerstin AU - Schoch, Roland AU - Vogel, Tobias AU - Donzelli, Manuel AU - Matveeva, Galina AU - Kolb, Ute AU - Bauer, Matthias AU - Slater, Peter R. AU - Clemens, Oliver ID - 41013 IS - 2 JF - Chemistry of Materials KW - Materials Chemistry KW - General Chemical Engineering KW - General Chemistry SN - 0897-4756 TI - Electrochemical Reduction and Oxidation of Ruddlesden–Popper-Type La2NiO3F2 within Fluoride-Ion Batteries VL - 33 ER - TY - JOUR AB - We present the η3-coordination of the 2-phosphaethynthiolate anion in the complex (PN)2La(SCP) (2) [PN=N-(2-(diisopropylphosphanyl)-4-methylphenyl)-2,4,6-trimethylanilide)]. Structural comparison with dinuclear thiocyanate-bridged (PN)2La(μ-1,3-SCN)2La(PN)2 (3) and azide-bridged (PN)2La(μ-1,3-N3)2La(PN)2 (4) complexes indicates that the [SCP]− coordination mode is mainly governed by electronic, rather than steric factors. Quantum mechanical investigations reveal large contributions of the antibonding π*-orbital of the [SCP]− ligand to the LUMO of complex 2, rendering it the ideal precursor for the first functionalization of the [SCP]− anion. Complex 2 was therefore reacted with CAACs which induced a selective rearrangement of the [SCP]− ligand to form the first CAAC stabilized group 15–group 16 fulminate-type complexes (PN)2La{SPC(RCAAC)} (5 a,b, R=Ad, Me). A detailed reaction mechanism for the SCP-to-SPC isomerization is proposed based on DFT calculations. AU - Watt, Fabian A. AU - Burkhardt, Lukas AU - Schoch, Roland AU - Mitzinger, Stefan AU - Bauer, Matthias AU - Weigend, Florian AU - Goicoechea, Jose M. AU - Tambornino, Frank AU - Hohloch, Stephan ID - 41010 IS - 17 JF - Angewandte Chemie International Edition KW - General Chemistry KW - Catalysis SN - 1433-7851 TI - η 3 ‐Coordination and Functionalization of the 2‐Phosphaethynthiolate Anion at Lanthanum(III)** VL - 60 ER - TY - JOUR AB - Here we explore the electronic structure of the diiron complex [(dppf)Fe(CO)3]0/+ [10/+; dppf = 1,1′-bis(diphenylphosphino)ferrocene] in two oxidation states by an advanced multitechnique experimental approach. A combination of magnetic circular dichroism, X-ray absorption and emission, high-frequency electron paramagnetic resonance (EPR), and Mössbauer spectroscopies is used to establish that oxidation of 10 occurs on the carbonyl iron ion, resulting in a low-spin iron(I) ion. It is shown that an unequivocal result is obtained by combining several methods. Compound 1+ displays slow spin dynamics, which is used here to study its geometric structure by means of pulsed EPR methods. Surprisingly, these data show an association of the tetrakis[3,5-bis(trifluoromethylphenyl)]borate counterion with 1+. AU - Winkler, Mario AU - Schnierle, Marc AU - Ehrlich, Felix AU - Mehnert, Kim-Isabelle AU - Hunger, David AU - Sheveleva, Alena M. AU - Burkhardt, Lukas AU - Bauer, Matthias AU - Tuna, Floriana AU - Ringenberg, Mark R. AU - van Slageren, Joris ID - 41012 IS - 5 JF - Inorganic Chemistry KW - Inorganic Chemistry KW - Physical and Theoretical Chemistry SN - 0020-1669 TI - Electronic Structure of a Diiron Complex: A Multitechnique Experimental Study of [(dppf)Fe(CO) 3]+/0 VL - 60 ER - TY - JOUR AB - Platinum hydride species catalyze a number of interesting organic reactions. However, their reactions typically involve the use of high loadings of noble metal and are difficult to recycle, making them somewhat unsustainable. We have synthesized surface-immobilized Pt–H species via oxidative addition of surface OH groups to Pt(PtBu3)2 (1), a rarely used immobilization technique in surface organometallic chemistry. The hydride species thus made were characterized by infrared, magic-angle spinning nuclear magnetic resonance, and X-ray absorption spectroscopies and catalyzed both olefin isomerization and cycloisomerization of a 1,6 enyne (5) with a high selectivity and low Pt loading. AU - Maier, Sarah AU - Cronin, Steve P. AU - Vu Dinh, Manh-Anh AU - Li, Zheng AU - Dyballa, Michael AU - Nowakowski, Michal AU - Bauer, Matthias AU - Estes, Deven P. ID - 41009 IS - 11 JF - Organometallics KW - Inorganic Chemistry KW - Organic Chemistry KW - Physical and Theoretical Chemistry SN - 0276-7333 TI - Immobilized Platinum Hydride Species as Catalysts for Olefin Isomerizations and Enyne Cycloisomerizations VL - 40 ER - TY - JOUR AB - The controlled assembly of well-defined planar nanoclusters from molecular precursors is synthetically challenging and often plagued by the predominant formation of 3D-structures and nanoparticles. Herein, we report planar iron hydride nanoclusters from reactions of main group element hydrides with iron(II) bis(hexamethyldisilazide). The structures and properties of isolated Fe4, Fe6, and Fe7 nanoplatelets and calculated intermediates enable an unprecedented insight into the underlying building principle and growth mechanism of iron clusters, metal monolayers, and nanoparticles. AU - Chakraborty, Uttam AU - Bügel, Patrick AU - Fritsch, Lorena AU - Weigend, Florian AU - Bauer, Matthias AU - Jacobi von Wangelin, Axel ID - 41011 IS - 2 JF - ChemistryOpen KW - General Chemistry SN - 2191-1363 TI - Planar Iron Hydride Nanoclusters: Combined Spectroscopic and Theoretical Insights into Structures and Building Principles VL - 10 ER - TY - BOOK ED - Standke, Jan ED - Topalovic, Elvira ID - 40920 KW - General Earth and Planetary Sciences KW - General Environmental Science SN - 0418-9426 TI - In Krisen erzählen – von Krisen erzählen. Sprachliche, literarische und mediale Dimensionen. VL - 68 ER - TY - CHAP AU - Sackel, Johanna AU - Wöbse, Anna-Katharina ED - Torma, Franziska ID - 40494 SN - 9781474299107 T2 - A Cultural History of the Sea in the Global Age TI - Networks VL - 6 ER - TY - BOOK ED - Plien, Christian ED - Topalovic, Elvira ID - 37092 KW - General Earth and Planetary Sciences KW - General Environmental Science SN - 0418-9426 TI - Mehrdeutigkeiten VL - 68 ER - TY - CONF AU - Adelt, Peer AU - Koppelmann, Bastian AU - Müller, Wolfgang AU - Scheytt, Christoph ID - 23992 T2 - Workshop Methoden und Beschreibungssprachen zur Modellierung und Verifikation von Schaltungen und Systemen (MBMV 2021) TI - Register and Instruction Coverage Analysis for Different RISC-V ISA Modules ER - TY - JOUR AU - Steinhoff, Lena AU - Zondag, Marcellis M. ID - 41313 JF - Journal of Business Research KW - Marketing SN - 0148-2963 TI - Loyalty programs as travel companions: Complementary service features across customer journey stages VL - 129 ER - TY - BOOK ED - Bürgel, Christoph ED - Koch, Corinna ED - Schlaak, Claudia ED - Visser, Judith ED - Heiderich, Jens ID - 41333 TI -  Zeitschrift für Romanische Sprachen und ihre Didaktik ER - TY - GEN ID - 41283 TI - Konstruktionen und Konstruktionslernen ER - TY - BOOK ED - Bürgel, Christoph ED - Koch, Corinna ED - Schlaak, Claudia ED - Visser, Judith ID - 41332 TI -  Zeitschrift für Romanische Sprachen und ihre Didaktik ER - TY - CONF AU - Kruse, Stephan AU - Bahmanian, Meysam AU - Kneuper, Pascal AU - Kress, Christian AU - Kurz, Heiko G. AU - Schneider, Thomas AU - Scheytt, Christoph ID - 23995 T2 - The 17th European Radar Conference TI - Phase Noise Investigation for a Radar System with Optical Clock Distribution ER - TY - JOUR AU - Wojtaszek, Klaudia AU - Błachucki, Wojciech AU - Tyrała, Krzysztof AU - Nowakowski, Michał AU - Zaja̧c, Marcin AU - Stȩpień, Joanna AU - Jagodziński, Paweł AU - Banaś, Dariusz AU - Stańczyk, Wiktoria AU - Czapla-Masztafiak, Joanna AU - Kwiatek, Wojciech M. AU - Szlachetko, Jakub AU - Wach, Anna ID - 41326 IS - 1 JF - The Journal of Physical Chemistry A KW - Physical and Theoretical Chemistry SN - 1089-5639 TI - Determination of Crystal-Field Splitting Induced by Thermal Oxidation of Titanium VL - 125 ER - TY - JOUR AB - Social robots have emerged as a new digital technology that is increasingly being implemented in the educational landscape. While social robots could be deployed to assist young children with their learning in a variety of different ways, the typical approach in educational practices is to supplement the learning process rather than to replace the human caregiver, e.g., the teacher, parent, educator or therapist. When functioning in the role of an educational assistant, social robots will likely constitute a part of a triadic interaction with the child and the human caregiver. Surprisingly, there is little research that systematically investigates the role of the caregiver by examining the ways in which children involve or check in with them during their interaction with another partnera phenomenon that is known as social referencing. In the present study, we investigated social referencing in the context of a dyadic child–robot interaction. Over the course of four sessions within our longitudinal language-learning study, we observed how 20 pre-school children aged 4–5 years checked in with their accompanying caregivers who were not actively involved in the language-learning procedure. The children participating in the study were randomly assigned to either an interaction with a social robot or a human partner. Our results revealed that all children across both conditions utilized social referencing behaviors to address their caregiver. However, we found that the children who interacted with the social robot did so significantly more frequently in each of the four sessions than those who interacted with the human partner. Further analyses showed that no significant change in their behavior over the course of the sessions could be observed. Findings are discussed with regard to the caregiver's role during children's interactions with social robots and the implications for future interaction design. AU - Tolksdorf, Nils F. AU - Crawshaw, Camilla E. AU - Rohlfing, Katharina ID - 37185 JF - Frontiers in Education KW - Education SN - 2504-284X TI - Comparing the Effects of a Different Social Partner (Social Robot vs. Human) on Children's Social Referencing in Interaction VL - 5 ER - TY - JOUR AU - Rohlfing, Katharina AU - Mertens, Ulrich ID - 37184 JF - Frontiers in Psychology TI - Progressive Reduction of Iconic Gestures Contributes to School-Aged Children’s Increased Word Production ER - TY - JOUR AB - Temperamental traits can decisively influence how children enter into social interaction with their environment. Yet, in the field of child–robot interaction, little is known about how individual differences such as shyness impact on how children interact with social robots in educational settings. The present study systematically assessed the temperament of 28 preschool children aged 4–5 years in order to investigate the role of shyness within a dyadic child–robot interaction. Over the course of four consecutive sessions, we observed how shy compared to nonshy children interacted with a social robot during a word-learning educational setting and how shyness influenced children’s learning outcomes. Overall, results suggested that shy children not only interacted differently with a robot compared to nonshy children, but also changed their behavior over the course of the sessions. Critically, shy children interacted less expressively with the robot in general. With regard to children’s language learning outcomes, shy children scored lower on an initial posttest, but were able to close this gap on a later test, resulting in all children retrieving the learned words on a similar level. When intertest learning gain was considered, regression analyses even confirmed a positive predictive role of shyness on language learning gains. Findings are discussed with regard to the role of shyness in educational settings with social robots and the implications for future interaction design. AU - Tolksdorf, Nils Frederik AU - Viertel, Franziska E. AU - Rohlfing, Katharina J. ID - 24899 JF - Frontiers in Robotics and AI SN - 2296-9144 TI - Do Shy Preschoolers Interact Differently When Learning Language With a Social Robot? An Analysis of Interactional Behavior and Word Learning ER - TY - CHAP AU - Heidgen, Michael ID - 41375 T2 - Metzler Lexikon literarischer Symbole TI - Wurzel ER -