Results 221 to 230 of about 49,559 (307)

Green Emissions of Atomic Oxygen at Sprite Tops Explained

Geophysical Research Letters, Volume 53, Issue 11, 16 June 2026.
Abstract Green emissions from excited Oxygen in Sprite Tops (GhOSTs) are due to the 557 nm photons emitted from atomic oxygen (O) $(\mathrm{O})$ excited to the 1S state. In this work we compare the possible contribution of various mechanisms for excitation of O(S1) $\mathrm{O}({}^{1}S)$ under application of a lightning‐induced electric field to the ...
Brandon Smith, Reza Janalizadeh, Victor P. Pasko   +2 more
wiley   +1 more source

Light-Induced Orthogonal Reactivity of Photoinitiators from One-Electron Reduction to Nanocomposites. [PDF]

Angew Chem Int Ed Engl
Schmallegger M, Wiech M, Gescheidt G.
europepmc   +1 more source

Strong Sensitivity of Simulated Biomass Burning Aerosol Transport and Radiative Effects Over the South Atlantic to Carbonaceous Aerosol Aging and Particle Density

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 11, 16 June 2026.
Abstract Biomass burning aerosol (BBA) impacts climate through aerosol‐cloud‐radiation interactions, but models disagree on the sign and magnitude of BBA radiative effects. We quantify the sensitivity of BBA radiative effects and transport to three BBA‐relevant processes and properties: parameterized oxidative aging of organic aerosol (OA), a combined ...
Kate Johnson, Eric Giuffrida, Paquita Zuidema, Arthur J. Sedlacek III., Ernie R. Lewis, Mira Pöhlker, Christopher Pöhlker, Baseerat Romshoo, Ben T. Johnson, Hamish Gordon   +9 more
wiley   +1 more source

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

Angewandte Chemie, Volume 138, Issue 24, 8 June 2026.
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   +2 more sources

Proton-Coupled Electron Transfer in Cytochrome c Oxidase: Heme a Controls the Protonation Dynamics of E286. [PDF]

Chemphyschem
Baserga F, Langner P, Schubert L, Storm JP, Schlesinger R, Heberle J.   +5 more
europepmc   +1 more source

Heterogeneous Iodine Chemistry Impacts Reactive Halogen and Oxidant Abundances

Geophysical Research Letters, Volume 53, Issue 11, 16 June 2026.
Abstract Tropospheric reactive halogens influence the oxidizing capacity of the atmosphere. Although previous studies have shown that iodine exerts the strongest impact on tropospheric ozone concentrations compared to chlorine and bromine, the impact of aerosol iodide recycling back to the gas phase on oxidants has not been estimated prior to this work.
Allison R. Moon, Leyang Liu, Xuan Wang, Yuk‐Chun Chan, Alyson Fritzmann, Ryan Pound, Amy Lees, Lewis Marden, Mat Evans, Lucy J. Carpenter, Jochen Stutz, Joel A. Thornton, Gordon Novak, Andrew Rollins, Gregory P. Schill, Xu‐Cheng He, Henning Finkenzeller, Mago Reza, Rainer Volkamer, Kelvin H. Bates, Alfonso Saiz‐Lopez, Anoop Sharad Mahajan, Becky Alexander   +22 more
wiley   +1 more source

Site‐Selective B─H Activation via HAT Toward Xanthyl‐closo‐Carboranes as Bench‐Stable Precursors of Organosulfur Boron Clusters

Angewandte Chemie, Volume 138, Issue 24, 8 June 2026.
A light mediated direct regioselective B─H functionalization, via hydrogen atom transfer (HAT), is described. Unexplored xanthyl‐closo‐carboranes as novel bench‐stable and versatile platforms to access sulfur‐containing boron clusters are reported for the first time.
Marco Rusconi, Eugenia Magi, Polyssena Renzi, Emanuele Azzi, Valeria Lagostina, Enrico Salvadori, Mario Chiesa, Birgit Hischa, Giovanni Ghigo, Annamaria Deagostino   +9 more
wiley   +2 more sources

OH-Initiated Photooxidation of Gas-Phase Atmospherically Relevant Monoterpene-Derived Organic Nitrates. [PDF]

Environ Sci Technol
Wang Y, Xie YK, Takeuchi M, Eris G, Ng NL.   +4 more
europepmc   +1 more source

MnCl2‐Catalyzed Photochemical Functionalization of Unactivated C(sp3)H Bonds

ChemSusChem, Volume 19, Issue 11, 15 June 2026.
A photochemical method enables the activation of alkanes, utilizing cheap and abundant MnCl2 as the photocatalyst. Alkenylation and alkylation reactions are performed, affording the desired products in good yields. Activation of inert C(sp3)H bonds is of great importance in organic synthesis, since it can functionalize unreactive molecules, such as ...
Naya A. Stini, Olga G. Mountanea, Vera P. Demertzidou, Christoforos G. Kokotos   +3 more
wiley   +1 more source

Photolysis of CO₂ Carbamate for Hydrocarboxylation Reactions. [PDF]

J Am Chem Soc
Azzi E, Rodríguez-Martínez M, Kolusu SRN, Scarfiello J, Varela JA, Nappi M.   +5 more
europepmc   +1 more source