Results 41 to 50 of about 121,504 (326)

Thermochemistry and photochemistry of spiroketals derived from indan-2-one: Stepwise processes versus coarctate fragmentations

Beilstein Journal of Organic Chemistry, 2013
Coarctate reactions are defined as reactions that include atoms at which two bonds are made and two bonds are broken simultaneously. In the pursuit of the discovery of new coarctate reactions we investigate the fragmentation reactions of cyclic ketals ...
Götz Bucher, Gernot Heitmann, Rainer Herges   +2 more
doaj   +1 more source

Interconversion and Removal of Inorganic Nitrogen Compounds via UV Irradiation

ChemEngineering, 2023
Dissolved inorganic nitrogen (DIN) species are key components of the nitrogen cycle and are the main nitrogen pollutants in groundwater. This study investigated the interconversion and removal of the principal DIN compounds (NO3−, NO2− and NH4+) via UV ...
Alejandro M. Senn, Natalia Quici
doaj   +1 more source

Transport and Reaction Processes in Soil [PDF]

, 2010
In order to register agrochemicals in Europe it is necessary to have a detailed understanding of the processes in the environment that break down agrochemicals.
Arab, N, Bazarganzadeh, Reza, Ceseri, M, Gallimore, Laura, Lacey, Andrew, Lustri, Chris, Majdodin, Rooholah, Ockendon, John, Please, Colin, Seguis, Jean-Charles, Shabala, Alex, Smith, Amy, Smith, Nadia, Somfai, E, Whittaker, Robert   +14 more
core   +1 more source

Strain‐Activated Photo‐Dehalogenation Unlocks Low‐Energy One and Two‐Photon 3D Microfabrication

Advanced Functional Materials, EarlyView.
5,14‐NMI‐Cz acts, conversely to its 7,10‐NMI‐Cz(7,10‐'dibromo‐2‐(2,6‐diisopropylphenyl)‐1H‐benzo[lmn]carbazolo[9,1‐bc][2,8]phenanthroline‐1,3(2H)‐dione) counterpart, as modular photoinitiator with panchromatic photoactivity, featuring a weak C–Br bond from geometric strain for efficient Type I & II initiation. These studies demonstrate applicability of
Kacper Piskorz, Katarzyna Starzak, Malgorzata Noworyta, Konrad Cyprych, Krzysztof Bartkowski, Zahra Badri, Sukhvinder Dhiman, Cina Foroutan‐Nejad, Jaroslaw Mysliwiec, Marcin Lindner, Joanna Ortyl   +10 more
wiley   +1 more source

Limited Long‐Term Photolysis of Stratospheric Organic Aerosols With Implications for CESM Modeling

Journal of Advances in Modeling Earth Systems
Organic aerosol (OA) is an important constituent of the Earth's atmosphere, yet the extent of its destruction by photolysis remains an active research question.
Jian Guan, Susan Solomon, Daniel M. Murphy, Kane Stone, Pengfei Yu, Douglas Kinnison, Gregory P. Schill, Simone Tilmes, Michael J. Lawler   +8 more
doaj   +1 more source

Unveiling Aggregation‐Induced Singlet Fission in Push–Pull Diketopyrrolopyrrole Water Dispersed Nanoaggregates and Thin Films

Advanced Functional Materials, EarlyView.
Aggregates of diketopyrrolopyrrole dipolar and quadrupolar systems exhibit panchromatic absorption spectra extending in the entire visible range. Upon aggregation in water and in the solid state, their fluorescence is almost completely quenched and their singlet excited state lifetime is significantly shortened.
Roberto Cantoni, Martina Alebardi, Eliana Maria D'Amato, Charu Popli, Yuvraj Patil, Pietro Mancini, Alessandro Di Michele, Anna Spalletti, Rajneesh Misra, Theodore Goodson, Benedetta Carlotti   +10 more
wiley   +1 more source

Nitrogen Incorporation in CH_4-N_2 Photochemical Aerosol Produced by Far Ultraviolet Irradiation [PDF]

, 2012
Nitrile incorporation into Titan aerosol accompanying hydrocarbon chemistry is thought to be driven by extreme UV wavelengths (λ120 nm is presently unaccounted for in atmospheric photochemical models.
Jimenez, Jose L., Tolbert, Margaret A., Toon, Owen B., Trainer, Melissa G., Yung, Yuk L.   +4 more
core  

Spectrophotometric studies of the photolysis of diazido-bis(phosphine)-metal(II) complexes [PDF]

, 1993
The photolysis of mixed ligand complexes of the type MLn(N3)2 (M=Ni, Pd, Pt; L = phosphane and diphosphane ligands, respectively; n = 1, 2) was monitored by electronic spectroscopy in absorption, emission and excitation.
Hennig, H., Knoll, H., Ritter, K., Vogler, Arnd   +3 more
core   +1 more source

Naturally Derived Donor‐π‐Acceptor Compounds for Efficient Long‐Wavelength LEDs/Sunlight‐Induced Polymerization and High‐Precision Multiple 3D Printing

Advanced Functional Materials, EarlyView.
Two novel donor–π–acceptor photoinitiators enable ultrafast long‐wavelength photopolymerization under blue/green LEDs and sunlight. Effective at low intensities and concentrations, they overcome slow kinetics and permit rapid 3D printing via DLW, DLP, and LCD methods.
Ji Feng, Tong Gao, Fabrice Morlet‐Savary, Michael Schmitt, Céline Dietlin, Jing Zhang, Pu Xiao, Frédéric Dumur, Jean‐Patrick Joly, Jacques Lalevée   +9 more
wiley   +1 more source

New Energy Technologies: Microalgae, Photolysis and Airborne Wind Turbines

Sci, 2021
Because of the near-term risk of extreme weather events and other adverse consequences from climate change and, at least in the longer term, global fossil fuel depletion, there is worldwide interest in shifting to noncarbon energy sources, especially ...
Patrick Moriarty, Damon Honnery
doaj   +1 more source