Results 11 to 20 of about 11,273 (240)

Probing halogen–halogen interactions in solution [PDF]

Physical Chemistry Chemical Physics, 2017
Weak but measurable: a supramolecular balance detects interactions between CBr3groups in solution and estimates the corresponding free energy (0.2 kJ mol−1).
Ayzac, V., Raynal, Matthieu, Isare, B., Idé, J., Brocorens, P., Lazzaroni, R., Etienne, T., Monari, A., Assfeld, Xavier, Bouteiller, Laurent   +9 more
openaire   +3 more sources

Preparo de amostras de combustíveis fósseis por piroidrólise para a determinação de flúor e cloro Fluoride and chloride determination in fossil fuels after sample preparation by pyrohydrolysis

Química Nova, 2010
Pyrohydrolysis is proposed for fossil fuels sample preparation for further fluorine and chlorine determination. Samples were heated during 10 min at temperatures up to 1000 °C.
Fabiane G. Antes, Fábio A. Duarte, Éder L. M. Flores, José Neri G. Paniz, Érico M. M. Flores, Valderi L. Dressler   +5 more
doaj   +1 more source

Possible Effects of Greenhouse Gases to Ozone Profiles and DNA Active UV-B Irradiance at Ground Level

Atmosphere, 2020
In this paper, we compare model calculations of ozone profiles and their variability for the period 1998 to 2016 with satellite and lidar profiles at five ground-based stations.
Kostas Eleftheratos, John Kapsomenakis, Christos S. Zerefos, Alkiviadis F. Bais, Ilias Fountoulakis, Martin Dameris, Patrick Jöckel, Amund S. Haslerud, Sophie Godin-Beekmann, Wolfgang Steinbrecht, Irina Petropavlovskikh, Colette Brogniez, Thierry Leblanc, J. Ben Liley, Richard Querel, Daan P. J. Swart   +15 more
doaj   +1 more source

Kinetics of the Reactions of Ozone with Halogen Atoms in the Stratosphere

Atmosphere, 2021
It is well established that reaction cycles involving inorganic halogens contribute to the depletion of ozone in the atmosphere. Here, the kinetics of O3 with halogen atoms (Cl, Br, and I) were investigated between 180 and 400 K, expanding the ...
S. Vijayakumar, Duminda S. Ranasinghe, David M. Wilmouth   +2 more
doaj   +1 more source

Intramolecular halogen–halogen bonds?

Physical Chemistry Chemical Physics, 2013
By analysing the properties of the electron density in the structurally simple perhalogenated ethanes, X3C-CY3 (X, Y = F, Cl), a previously overlooked non-covalent attraction between halogens attached to opposite carbon atoms is found. Quantum chemical calculations extrapolated towards the full solution of the Schrödinger equation reveal the complex ...
Johansson, Mikael P., Swart, Marcel
openaire   +5 more sources

Composition of minerals (apatite, magnenite, ilmenite and others) as an index of conditions of layered massive ore formation in the laminated gabbro of Kusa intrusion (the Southern Urals)

Литосфера, 2019
Research subject. In this research, we carried out a series of mineralogical, petrological and geochemical studies to investigate ore zones present in the Kusa ilmenite-magnetite deposit located within the boundaries of a similarly-named laminated gabbro
T. D. Bocharnikova, V. V. Kholodnov, Y. S. Shagalov   +2 more
doaj   +1 more source

New Halogen-Containing Drugs Approved by FDA in 2021: An Overview on Their Syntheses and Pharmaceutical Use

Molecules, 2022
This review describes the recent Food and Drug Administration (FDA)-approved drugs (in the year 2021) containing at least one halogen atom (covalently bound).
Davide Benedetto Tiz, Luana Bagnoli, Ornelio Rosati, Francesca Marini, Luca Sancineto, Claudio Santi   +5 more
doaj   +1 more source

Halogen (Cl, F) release during explosive, effusive, and intrusive phases of the 2011 rhyolitic eruption at Cordón Caulle volcano (Chile)

Volcanica, 2019
We investigate sulphur, chlorine and fluorine release during explosive, effusive and intrusive phases the 2011 Cordón Caulle eruption, with a focus on halogen devolatilization. Petrological analysis shows halogen release to have been promoted by isobaric
C Ian Schipper, Jonathan M Castro, Ben M Kennedy, Bruce W Christenson, Alessandro Aiuppa, Brent Alloway, Pablo Forte, Gilles Seropian, Hugh Tuffen   +8 more
doaj   +1 more source

Direct C2–H alkylation of indoles driven by the photochemical activity of halogen-bonded complexes

Beilstein Journal of Organic Chemistry, 2023
A light-driven metal-free protocol for the synthesis of sulfone-containing indoles under mild conditions is reported. Specifically, the process is driven by the photochemical activity of halogen-bonded complexes formed upon complexation of a sacrificial ...
Martina Mamone, Giuseppe Gentile, Jacopo Dosso, Maurizio Prato, Giacomo Filippini   +4 more
doaj   +1 more source

High-spectral-resolution Fabry-Pérot interferometers overcome fundamental limitations of present volcanic gas remote sensing techniques

Frontiers in Earth Science, 2023
Remote sensing (RS) of volcanic gases has become a central tool for studying volcanic activity. For instance, ultraviolet (UV) skylight spectroscopy with grating spectrographs (GS) enables SO2 (and, under favourable conditions, BrO) quantification in ...
Jonas Kuhn, Jonas Kuhn, Nicole Bobrowski, Nicole Bobrowski, Guillaume Boudoire, Guillaume Boudoire, Sergio Calabrese, Sergio Calabrese, Giovanni Giuffrida, Marco Liuzzo, Katcho Karume, Dario Tedesco, Dario Tedesco, Thomas Wagner, Ulrich Platt, Ulrich Platt   +15 more
doaj   +1 more source