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Item type: Item , Stabilizing Copper(I) Complexes by Terminal Olefinic Side Arms and Studying Their Reactivity Towards Oxidation(2025) Granichny, Alexander; Würtele, Christian; Schindler, SiegfriedItem type: Item , Lattice Dynamics of LiNb 1-xTaxO3 Solid Solutions: Theory and Experiment(2025) Bernhardt, Felix; Gharat, Soham; Kapp, Alexander; Pfeiffer, Florian; Buschbeck, Robin; Hempel, Franz; Pashkin, Oleksiy; Kehr, Susanne C.; Rüsing, Michael; Sanna, Simone; Eng, Lukas M.Lithium niobate (LNO) and lithium tantalate (LTO) see widespread use in fundamental research and commercial technologies reaching from electronics over classical optics to integrated quantum communication. The mixed crystal system lithium niobate tantalate (LNT) allows for the dedicate engineering of material properties by combining the advantages of the two parental materials LNO and LTO. Vibrational spectroscopies such as Raman spectroscopy or (Fourier transform) infrared (IR) spectroscopy are vital techniques to provide detailed insight into the material properties, which is central to the analysis and optimization of devices. This work presents a joint experimental–theoretical approach allowing to unambiguously assign the spectral features in the LNT material family through both Raman and IR spectroscopy, as well as providing an in-depth explanation for the observed scattering efficiencies based on first-principles calculations. The phononic contribution to the static dielectric tensor is calculated from the experimental and theoretical data using the generalized Lyddane–Sachs–Teller relation and compared with the results of the first-principles calculations.Item type: Item , Social Identification in Times of Crisis: How Need to Belong, Perspective Taking, and Cognitive Closure Relate to Changes in Social Identification(2025) Till, Franziska Julia; Heimrich, Julia; Frenzel, Svenja B.; van Dick, Rolf; Mojzisch, Andreas; Junker, Nina M.; Häusser, Jan A.In a world shaped by global crises—from pandemics to international armed conflicts to an escalating climate crisis—research into human reactions to and coping with uncertainty is becoming increasingly important. The fundamental role of identification with social groups in maintaining well-being during times of threat has been emphasized. In this context, the aim of this study was to examine the relationship between interindividual differences— need to belong, perspective taking, need for cognitive closure—and changes in social identification. To test our hypotheses, we conducted a two-wave online study with a sample of 1008 participants during the COVID-19 pandemic. We examined changes in social identification in narrow social groups (i.e., family, friends, neighbors) and broader social categories (i.e., own country, Europe, humanity). We found an overall increase in social identification in times of crises across all groups. The results show that need to belong (at Time 1) was positively related to increases in social identification (at Time 2) for all groups, while the positive association between perspective taking (at Time 1) and increases in social identification (at Time 2) was observed for almost all groups except neighbors. Contrary to our expectations, however, the need for cognitive closure (at Time 1) showed no association with changes in identification with any social group (at Time 2). These findings emphasize the importance of interindividual differences for our understanding of changes in social identification over time.Item type: Item , Decoupling the Effects of Interface Chemical Degradation and Mechanical Cracking in Solid-State Batteries with Silicon Electrode(2025) Huo, Hanyu; Bai, Yang; Benz, Sebastian Leonard; Weintraut, Timo; Wang, Shuo; Henss, Anja; Raabe, Dierk; Janek, JürgenSilicon is a promising negative electrode material for solid-state batteries (SSBs) due to its high specific capacity and ability to prevent lithium dendrite formation. However, SSBs with silicon electrodes currently suffer from poor cycling stability, despite chemical engineering efforts. This study investigates the cycling failure mechanism of composite Si/Li6PS5Cl electrodes by decoupling the effects of interface chemical degradation and mechanical cracking. Chlorine-rich Li5.5PS4.5Cl1.5 suppresses interface chemical degradation when paired with silicon, while small-grained Li6PS5Cl shows 4.3-fold increase of interface resistance due to large Si/Li6PS5Cl contact area for interface degradation. Despite this, small-grained Li6PS5Cl improves the microstructure homogeneity of the electrode composites, effectively alleviating the stress accumulation caused by the expansion/shrinkage of silicon particles. This minimizes bulk cracks in Li6PS5Cl during the lithiation processes and interface delamination during the delithiation processes. Mechanical cracking shows a dominant role in increasing interface resistance than interface chemical degradation. Therefore, electrodes with small-grained Li6PS5Cl show better cycling stability than those with Li5.5PS4.5Cl1.5. This work not only provides an approach to decouple the complex effects for cycling failure analysis but also provides a guideline for better use of silicon in negative electrodes of SSBs.Item type: Item , Success of the German Cystic Fibrosis Registry(2025) Naehrlich, Lutz; Burkhart, ManuelThe German Cystic Fibrosis (CF) Registry (GCFR) is a national General Data Protection Regulation–compliant centralised database sponsored by the German Cystic Fibrosis Association (Mukoviszidose e.V.) and based on informed consent for each participating patient, ethical approval, and data protection votes. The aims of the GCFR are to optimise quality of care for CF at the centres, generate epidemiologic overviews, address research questions related to improved CF care, and inform caregivers, patients (aimed at patient empowerment), and health authorities and industry (aimed at care planning and pharmacovigilance). Established in 1995, the Registry has captured data on > 9600 individuals with a combined total of more than 140 000 annual assessments with an estimated coverage rate of > 90%. Patient data are collected after informed consent and confirmed diagnosis of CF, or a CFTR-related disorder, or a screening-positive inconclusive diagnosis of CF (i.e., CFSPID). The registry collects core, encounter, and annual health data. Data include demographics, anthropometrics, lung function, microbiology, CF-specific complications and chronic medications, hospitalisations, demand-oriented antibiotic therapies, and outcomes (death and transplants). Real world and pharmacovigilance studies have been published and additional research underway; there is a formal process for requesting access to the GCFR.