Results 21 to 30 of about 8,584 (146)

Sensitivity of tropospheric ozone to halogen chemistry in the chemistry–climate model LMDZ-INCA vNMHC [PDF]

open access: yesGeoscientific Model Development, 2023
The atmospheric chemistry of halogenated species (Cl, Br, I) participates in the global chemical sink of tropospheric ozone and perturbs the oxidising capacity of the troposphere, notably by influencing the atmospheric lifetime of methane.
C. Caram   +5 more
doaj   +1 more source

Encapsulation and Adsorption of Halogens into Single-Walled Carbon Nanotubes

open access: yes, 2021
Functionalisation of single-walled carbon nanotubes (SWNTs) with atoms and molecules has the potential to prepare charge–transfer complexes for numerous applications. Here, we used density functional theory with dispersion correction (DFT + D) to examine
Sashikesh Ganeshalingam   +1 more
core   +1 more source

Defect Processes in Halogen Doped SnO2

open access: yesApplied Sciences, 2021
In the present study, we performed density functional theory calculations (DFT) to investigate structural changes and their impact on the electronic properties in halogen (F, Cl, Br, and I) doped tin oxide (SnO2).
Petros-Panagis Filippatos   +4 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)

open access: yesVolcanica, 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   +8 more
doaj   +1 more source

New Oxindole-Bridged Acceptors for Organic Sensitizers: Substitution and Performance Studies in Dye-Sensitized Solar Cells

open access: yesMolecules, 2020
New D-π-A configured organic sensitizers featuring halogen-substituted oxindole-bridged acceptor units have been synthesized for dye-sensitized solar cells applications.
Yogesh S. Tingare   +5 more
doaj   +1 more source

Halogen⋯halogen contra C–H⋯halogen interactions

open access: yesCrystEngComm, 2014
Pressure affects the competition between C–H⋯X hydrogen bonds and X⋯X halogen⋯halogen interactions. In bromomethane, CH3Br, pressure changes the molecular arrangement of the two solid-state phases of this compound: low-pressure phase α is dominated by halogen⋯halogen interactions, whereas above 1.5 GPa the β phase is governed by C–H⋯halogen bonds.
Marcin Podsiadło   +2 more
openaire   +2 more sources

Volcanic Halogens Processing and Impacts in the Troposphere and Stratosphere

open access: yes, 2018
International audienceVolcanoes release vast quantities of gases, including halogens (e.g. HBr, HCl) as well as sulfur (SO2). Volcanic SO2 is oxidized into sulfate aerosols in the atmosphere that impact climate and favor the destruction of stratospheric ...
Jourdain, Lise   +4 more
core   +7 more sources

Halogens in volcanic systems

open access: yes, 2009
The transport, degassing and atmospheric release of halogens from active volcanism on Earth have been the 12 focus of increasing interest over the last few decades, and have recently been the subject of the 1st workshop 13 on “Halogens in volcanic ...
Webster, JD   +5 more
core   +2 more sources

Stable bromine isotopic composition of atmospheric CH3Br

open access: yesTellus: Series B, Chemical and Physical Meteorology, 2013
Tropospheric methyl bromide (CH3Br) is the largest source of bromine to the stratosphere and plays an important role in ozone depletion. Here, the first stable bromine isotope composition (%26dgr%3B81Br) of atmospheric CH3Br is presented.
Axel Horst   +5 more
doaj   +1 more source

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

open access: yesAtmosphere, 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   +15 more
doaj   +1 more source

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