Results 221 to 230 of about 126,801 (303)

Hydrogen Isotope Exchange in Pyridine Catalyzed by an Iron(II) Imido Complex: Counterion‐Directed Regioselectivity

Angewandte Chemie, EarlyView.
Anionic high‐spin iron(II) imido complexes are catalysts for the hydrogen isotope exchange (HIE) reaction with pyridine as the substrate. The alkali metal counter‐cation plays critical roles in activating the substrate and facilitating deuteration. These complexes catalyze site‐selective α‐, α,β,γ‐, and β,γ‐deuteration of pyridine, where the counter ...
Bin Feng, Guorong Li, Yafei Gao, Nobuyuki Yamamoto, Maren Pink, Qian Peng, Jeremy M. Smith   +6 more
wiley   +1 more source

Photoinduced Transformation in Glyoxal- and Methylglyoxal-Ammonium Solutions: Role of Photolysis and Photosensitization. [PDF]

Environ Sci Technol
Gu J, Dutta S, Sioud S, Go BR, Maity B, Cavallo L, Zhang R, Chan CK.   +7 more
europepmc   +1 more source

Photoactivated Signaling Networks using DNA‐Based Synthetic Organelles as Biomimetic Protocells

Angewandte Chemie, EarlyView.
Light‐triggered intercommunication between two types of organelle‐loaded liposomes lead to DNAzyme‐mediated on transcription‐guided structural reconfiguration of the organelles. ABSTRACT Membraneless organelles formed by phase‐separated nucleic acid or protein condensates play vital roles in regulating cellular functions.
Huiying Xue, Yunlong Qin, Yichen Han, Shijun Xu, Itamar Willner, Fan Xia, Fujian Huang   +6 more
wiley   +1 more source

Open-Source Photochemistry in the Organic Chemistry Teaching Laboratory. [PDF]

ACS Omega
Levandoski KC, Jiotis C, Kenar JA, Kregel SJ, Montag SD.   +4 more
europepmc   +1 more source

From [NHC─H]• to Persistent σ‐Complex Radicals: Photoinduced Radical Chemistry of Imidazolium Salts

Angewandte Chemie, EarlyView.
Visible‐light excitation of electron donor–acceptor (EDA) complexes between imidazolium salts and triarylamines enables controlled single‐electron transfer (SET) and reveals a family of carbene‐centered σ‐complex radical cations. Cryogenic electron paramagnetic resonance (EPR) captures the elusive [NHC─H]• intermediate and its thermal evolution into ...
Filipp M. Kolomeychuk, Lars J. C. van der Zee, Simon Mathew, Bas de Bruin, J. Chris Slootweg   +4 more
wiley   +1 more source

Mixed‐Functionalized Acylgermanes Result in Wavelength‐Controlled Fragmentation

Angewandte Chemie, EarlyView.
Selective radical generation from PEG‐acylgermanes is achieved by controlling the used wavelength. Distinct aryl‐carbonyl units undergo wavelength‐dependent α‐cleavage, producing radicals with different reactivities. UV/Vis, TD‐DFT, and photo‐CIDNP spectroscopy confirm that small adjustments in light input directly dictate radical identity and ...
André Culum, Manfred Drusgala, Roland C. Fischer, Anne‐Marie Kelterer, Mario Leypold, Dmytro Neshchadin, Michael Haas   +6 more
wiley   +1 more source

Correction to "Rapid Activation of 3D-Printed Carbon Electrodes by Atmospheric Air Plasma: Toward Electrochemical Drug Analysis". [PDF]

ACS Omega
Kováč M, Gregová K, Švorc Ĺ, Zažímal F, Homola T, Gemeiner P.   +5 more
europepmc   +1 more source

Controlling Near‐Infrared Fluorescence‐to‐Phosphorescence Ratios and Triplet Lifetimes in Rhodium(I) Dimers via Primary and Secondary Coordination Sphere Effects

Angewandte Chemie, EarlyView.
RhI dimers with bridging aryl isocyanide and di‐phosphine ligands show NIR‐I or NIR‐II fluorescence/phosphorescence, depending on the ligands and conformational rigidity at the Rh2 core. Rh‐Rh interactions can be tuned by peripheral modification of the aryl isocyanide ligand, resulting in a rigid Rh2 core and improved photophysical properties ...
Vanitha R. Naina, Giacomo Morselli, Alessandro Prescimone, Daniel Häussinger, Oliver S. Wenger   +4 more
wiley   +1 more source

Cavitand-Mediated Photodimerization of Chalcones: The Effect of Supramolecular Influences and Temperature on Reaction Selectivity. [PDF]

Molecules
Chatterjee J, Pattabiraman M, Chakraborty D, Wysocki AL, Kovacs F.   +4 more
europepmc   +1 more source

An Artificial Molecular Pump Powered by Light

Angewandte Chemie, EarlyView.
A minimal rotaxane‐based supramolecular system functions as a light‐powered molecular pump, capturing macrocycles from solution and concentrating them within an intramolecular compartment. Repeated azobenzene photoisomerization modulates the binding and kinetic barriers of threading and shuttling, generating a photon‐driven energy ratchet that sustains
Federico Nicoli, Chiara Taticchi, Stefano Corra, Marina Tranfić Bakić, Massimo Baroncini, Serena Silvi, Jessica Groppi, Alberto Credi   +7 more
wiley   +1 more source