Results 171 to 180 of about 5,915,895 (288)
Angewandte Chemie, EarlyView.Pt1, an organometallic platinum‐based complex, act as a modulator of redox homeostasis in cnidarians, regulating cellular functions and life‐cycle dynamics. In Nematostella vectensis, it mitigates oxidative stress, strengthens detox systems and accelerates development.
Giuseppina Tommasini +13 more
wiley +2 more sources
pH‐Responsive Ultrasmall Iron Oxide Nanoassemblies for Activatable T2/T1 Magnetic Resonance Imaging
Advanced NanoBiomed Research, EarlyView.This research reports a pH‐responsive ultrasmall iron oxide nanoparticle (USIONs)/polymer nanoassemblies for activatable magnetic resonance imaging. Amphiphilic diphosphonic acid block copolymers compactly encapsulate USIONs to generate T2‐weighted contrast at physiological pH, while acidic conditions trigger disassembly, activating T1‐weighted ...
Xumin Huang +11 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 +7 more
wiley +2 more sources
Fine Tuning of Catalyst Active Sites to Access Advanced Ultrahigh‐Melting Polyolefins
Angewandte Chemie, EarlyView.A redesign of the active site of the pyridylamido hafnium (Hf) catalysts can enhance the performance of this catalyst family and unlock previously inaccessible polymer structures. When the catalyst is precontacted with allyltrimethylsilane the active species is modified and the catalyst experiences a new life becoming able to polymerize sterically ...
Fabio De Stefano +3 more
wiley +2 more sources
Angewandte Chemie, EarlyView.Durch die Kombination von polarisationsaufgelöster IRRAS mit hybriden HSE06‐DFT‐Berechnungen ermitteln wir platzspezifische Schwingungsfingerabdrücke, Adsorptionsgeometrien und Bindungsenergien für CO auf MgO‐Oberflächen mit großer Bandlücke. Niedrig koordinierte Mg4c2+‐Stufenkantenplätze werden anstelle von Schottky‐Defekten auf Terrassen als die ...
Wangtao Li +9 more
wiley +1 more source
Angewandte Chemie International Edition, EarlyView.By combining polarization‐resolved IRRAS with hybrid HSE06 DFT calculations, we establish site‐specific vibrational fingerprints, adsorption geometries, and binding energies for CO on wide‐band‐gap MgO surfaces. Low‐coordinated Mg4c2+ step‐edge sites, rather than terrace Schottky defects, are identified as the dominant binding and reactive sites, with ...
Wangtao Li +9 more
wiley +1 more source
A Ruthenium(CAAC‐5) Olefin Metathesis Catalyst for Bioconjugation
Angewandte Chemie International Edition, EarlyView.The aqueous instability of ruthenium catalysts restricts olefin metathesis in biological media. A Ru(CAAC‐5) complex bearing an aniline handle is reported that remains active under biologically relevant conditions and enables bioconjugation to proteins, peptides, and an artificial metalloenzyme, providing a robust platform for olefin metathesis in ...
Damian Alexander Graf +4 more
wiley +1 more source
Strain‐Tunable Photoluminescence From Ge Quantum Dots on Si Nanotips for CMOS‐Compatible Photonics
Advanced Physics Research, EarlyView.This work studies strain in Ge quantum dots grown on Si nanotips using photoluminescence, X‐ray diffraction, and band structure calculations. It shows how emission changes with dot size, evaluates strain in the dot and substrate, and explains the role of direct and indirect transitions in the optical behavior.
Diana Ryzhak +10 more
wiley +1 more source
Rapid Lab‐Based In Situ Monitoring of Germanium Multiple Quantum Wells Interdiffusion
Advanced Physics Research, EarlyView.This study emphasizes important insights into thermally activated diffusion control in Ge/SiGe multiple quantum wells for future design of high‐performance group‐IV optoelectronic devices. A particular fast data acquisition is achieved by in situ X‐ray diffraction and the influence of interdiffusion on the optical properties is presented by ...
Diana Ryzhak +8 more
wiley +1 more source
Cu Site Preference and Structural Evolution in Cu‐Doped BiMn7O12 Quadruple Perovskite
Advanced Physics Research, EarlyView.Light Cu substitution in the quadruple perovskite BiMn7‐xCuxO12 progressively suppresses monoclinic distortion while enhancing local structural disorder and weakening magnetic order. Unexpected Cu site preferences inferred experimentally contrast with first‐principles predictions, revealing a delicate competition among local bonding, structural ...
Cheng Peng +6 more
wiley +1 more source