Results 181 to 190 of about 2,767,492 (285)

Axially Chiral Nonalternant Polycyclic Aromatic Hydrocarbon With Consecutive Pentagons Exhibiting Large Spin‐Polarized Current

Angewandte Chemie, EarlyView.
Here we report two nonalternant polycyclic aromatic hydrocarbons (PAH) (1 and 2), which contain two and four consecutive pentagons, respectively. Under acidic conditions, 1 and 2 dimerize to afford the axially chiral dimers AC1 and AC2. The central azulene moiety in both 2 and AC2 shows an unusually short transannular bond of 1.366 Å.
Chang Wang, Jiaxin Luo, Haipeng Lu, Junzhi Liu   +3 more
wiley   +1 more source

Use of Electron Paramagnetic Resonance (EPR) to Evaluate Redox Status in a Preclinical Model of Acute Lung Injury. [PDF]

Mol Imaging Biol
Elajaili HB, Dee NM, Dikalov SI, Kao JPY, Nozik ES.   +4 more
europepmc   +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   +2 more sources

Tuning Pore Geometry of Zirconium Metal–Organic Frameworks via Bent Ligands for Enhanced Sulfide Oxidation Catalysis

Angewandte Chemie, EarlyView.
Engineering pore geometry through ligand conformational bending enhances active‐site accessibility and mass transport in Zr‐MOFs, leading to superior catalytic sulfide oxidation. ABSTRACT Pore engineering represents a powerful strategy to tailor the physicochemical properties of metal–organic frameworks (MOFs), yet the structure‐activity relationship ...
Zhaoyi Liu, Joshua Rushlow, Jiatong Huo, Wenlu Fan, Kui Tan, Shengqian Ma, Rong‐Ran Liang, Hong‐Cai Zhou   +7 more
wiley   +2 more sources

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   +2 more sources

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   +2 more sources

The coupled study of metal concentrations and electron paramagnetic resonance (EPR) of lichens (Hypogymnia physodes) from the Świętokrzyski National Park-environmental implications. [PDF]

Environ Sci Pollut Res Int, 2018
Ciężka MM, Górka M, Modelska M, Tyszka R, Samecka-Cymerman A, Lewińska A, Łubek A, Widory D.   +7 more
europepmc   +1 more source

Axial Boron Coordination Reconstructs Stereostructure of Cu Single‐Atom Nanozymes for Efficient Water‐Phase Chemical Sensing

Angewandte Chemie, EarlyView.
Sun et al. proposed an axial boron coordination strategy to reconstruct the stereostructure of Cu SAzymes and enable them to serve as efficient laccase mimics for high‐throughput smart sensor array detection of phenolic pollutants in water phases. ABSTRACT Developing single‐atom nanozymes with stereoconfigurations is a new paradigm for biomimetic ...
Qijun Sun, Hongyu Shi, Si Liu, Ziping Li, Yu Yang, Fengwang Li, Wenli Wu, Qiongzheng Hu, Kang Liang   +8 more
wiley   +1 more source

Redox‐Modulated σ‐Bond Reactivity in a Radical‐Anion Dimer

Angewandte Chemie International Edition, Volume 65, Issue 44, 26 October 2026.
A radialene‐based radical anion σ‐dimer comprising an elongated C‐C bond exhibits orthogonal stimuli responsiveness. Homolytic cleavage of the dimer to the radical state is triggered by mechanical strain and high temperature. Dimer scission is also achieved via oxidation, resulting in formation of neutral radialenes.
Sushil Ranjan Bhatta, Jonathan H. Gillen, Amaya T. Jayaweera, Fuead Hasan, Diana P. Merenkov, Hai Zhao, Sepideh Asgari, Arthur H. Winter, Christopher M. Bejger   +8 more
wiley   +1 more source

EPR spectroscopy 80 years after its discovery. [PDF]

Sci Adv
Goldfarb D, Jeschke G, McInnes EJL, Prisner T, Schiemann O, Stoll S.   +5 more
europepmc   +1 more source