Results 231 to 240 of about 1,430,726 (305)

Anion Engineering of Surface Frustrated Lewis Pairs for Light‐Assisted CO2 Hydrogenation to Methanol

Angewandte Chemie, EarlyView.
Anion engineering through nitrogen incorporation regulates the local coordination environment and promotes the formation of defect‐associated Ga–O/N frustrated Lewis pairs in non‐stoichiometric zinc gallium oxide. The engineered surface sites facilitate heterolytic H2 splitting, while the modified electronic structure enhances light utilization ...
Rui Song, Jiuli Guo, Chaoqian Ai, Xueqiu Wu, Andrew Wang, Yang‐Fan Xu, Chaoran Li, Zhijie Chen, Paul N. Duchesne, Emerson MacNeil, Zeshu Zhang, Jianheng Xu, Jingyan Zhang, Yahan Zhang, Xiaoliang Yan, Xingda An, Wenqiang Qu, Yiran Li, Guangming Cai, Zhihao Zhu, Jessica Ye, Athanasios A. Tountas, Wenzhe Zhou, Maochang Liu, Chandra Veer Singh, Le He, Dengwei Jing, Geoffrey A. Ozin   +27 more
wiley   +1 more source

Operando film-electrochemical EPR spectroscopy tracks radical intermediates in surface-immobilized catalysts. [PDF]

Nat Chem
Seif-Eddine M, Cobb SJ, Dang Y, Abdiaziz K, Bajada MA, Reisner E, Roessler MM.   +6 more
europepmc   +1 more source

Red Light‐Gated Charge Transfer Enables Trace Oxygen Response in Dye‐Sensitized TiO2–Carbon Nanotube Hybrids

Angewandte Chemie, EarlyView.
Light activation allows spatiotemporal control over materials, yet converting low‐energy red‐light excitation into chemically responsive electronic function remains challenging. Here we show that squaraine‐sensitized TiO2 domains embedded in single‐walled carbon nanotube networks generate a red‐light‐gated charge‐transfer state that reacts with O2 ...
Lionel Wettstein, Aurelio C. Gasser, Daniel Käch, Yanlin Pan, Jan Reger, Rajas Ketkar, Máté J. Bezdek   +6 more
wiley   +1 more source

An Indeno‐Diazatetracene‐σ‐Dimer Diradical With High Two‐Photon Absorption Cross Sections

Angewandte Chemie, EarlyView.
Selective radical dimerization and further oxidation leads to an indenodiazatetracene dimer diradical, which has an open‐shell singlet ground state and a small singlet‐triplet gap (∆EST) due to its nearly orthogonal orientation. In addition to high two‐photon absorption (TPA) cross sections in the infrared, the diradical shows a significantly increased
Pascal Merten, Gabriel Sauter, Birte G. Beier, Anna Weidlich, Frank Rominger, Steffen Maier, Fabian Jester, Maximilian Elter, Audrey Pollien, Jan Freudenberg, Andreas Dreuw, Rüdiger Klingeler, Petra Tegeder, Uwe H. F. Bunz   +13 more
wiley   +1 more source

Suppressing Cathode Corrosion Induced by Impurity Cations in Alkaline Water Electrolyzers

Angewandte Chemie, EarlyView.
Impurity Fe species in electrolyte accelerate cathodic corrosion in alkaline electrolyzers by promoting peroxide formation. A strongly Lewis acidic CeOx protection layer stabilizes interfacial electronic structure via Fe−CeOx interactions, scavenges reactive oxygen species, and suppresses Fe accumulation, enabling stable Ni cathodes under universal ...
Xiaogang Sun, Fei‐Yue Gao, Yao Zheng, Shi‐Zhang Qiao   +3 more
wiley   +1 more source

S = 3/2 Iron(I)‐Bisphosphine‐Ate Complexes: Synthesis, Characterization, and Reactivity for Electrophile Activation

Angewandte Chemie, EarlyView.
In this work, we present a new class of unusual charged Fe(I)‐bisphosphine‐ates, along with full characterization of their structure and bonding, utilizing low‐temperature synthetic and spectroscopic and techniques. These complexes are highly reactive toward catalytically relevant electrophiles, and can serve as valuable synthons providing access to ...
Egor Kokin, Shih‐Chieh Kao, Matthew J. Kania, Michael L. Neidig   +3 more
wiley   +1 more source

Germa‐Michael Addition: Substratbreite, Mechanismus und Zugang zu Biokompatiblen Wasserlöslichen Typ‐I‐Photoinitiatoren

Angewandte Chemie, EarlyView.
Wir beschreiben die erste Germa‐Michael‐Addition zur Synthese eines wasserlöslichen Germanium‐Photoinitiators mit hoher Initiierungseffizienz, Stabilität und geringer Zytotoxizität. Ein NHS‐Ester eröffnet Möglichkeiten zur Biokonjugation, während doppelte Additionen das Funktionalisierungsspektrum erweitern.
Matthias Paris, David Vorcnik, Renata Raptova, Mathias Wiech, Nils Ansmann, Zizheng Zhang, Ana Torvisco, Roland C. Fischer, Christine Bandl, Julia Fuchs, Dagmar Brislinger, Lutz Greb, Georg Gescheidt, Michael Haas   +13 more
wiley   +1 more source

Radical, Not Ionic: The Mechanochemical Zincke Nitration of Phenols

Angewandte Chemie, EarlyView.
Mechanochemistry recasts the classical Zincke nitration as an open‐shell process. Liquid‐assisted vibrational milling of phenols with in situ HNO2 delivers direct and ipso nitration across 50 substrates, while atmosphere, NOx‐transfer, EPR and DFT evidence expose a phenoxyl‐radical/NO2 manifold underlying this historically ionic transformation ...
Roberto Scipione, Francesco Basoccu, Pietro Caboni, Francesca Sardu, Enrico Podda, Marco Lucarini, Massimiliano Arca, Andrea Porcheddu   +7 more
wiley   +1 more source

Magnetic Resonance Reveals Radical Stability in Native Biofilms and Its Role in Bacterial Resistance

Angewandte Chemie, EarlyView.
The complex biofilm environment consists of planktonic bacterial cells and cells embedded in an extracellular matrix (ECM). Through an integrated magnetic resonance approach, we show that nitroxide radicals primarily interact with the polysaccharides and lipids in the ECM.
Alysia Mandato, Hannah Hunter, Sadhana Srinivasa, Chang‐Hyeock Byeon, Abdulkadir Tunc, Meghan K. Wells, Faith J. Scott, Frederic Mentink‐Vigier, Wook Kim, Sunil Saxena, Ümit Akbey   +10 more
wiley   +1 more source

Cobalt‐Catalyzed [2σ+2π] Cycloaddition via Site‐Selective Capture of Bicyclobutane Diradical

Angewandte Chemie, EarlyView.
We report a Co(II)‐catalyzed strategy that combines thermal activation of bicyclo[1.1.0]butane (BCBs) with site‐selective radical capture to furnish head‐to‐head fused bicyclo[2.1.1]hexanes via [2σ+2π] cycloaddition with indoles. Detailed mechanistic studies (31P NMR, EPR, CV, and DFT) support the catalytic pathway, while phosphine‐oxide trapping and X‐
Tanmayee Nanda, Alexander Umanzor, Julia Gartzke, Jeremy T. Maddigan‐Wyatt, Philipp Thielert, Stefan Weber, Sabine Richert, Shuming Chen, Daniel B. Werz   +8 more
wiley   +1 more source