Dissociation of dimethyl sulfide on water ice initiated by low-energy (<20 eV) electrons

文献情報

出版日 2004-01-27

DOI 10.1039/B314331G

インパクトファクター 3.676

著者

Hassan Abdoul-Carime, Léon Sanche

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要旨

Dimethyl sulfide (CH3SCH3) is the most widespread of biogenic sulfur compounds responsible for sulfur aerosol production in the atmosphere. Here, we show that low-energy electrons, produced by ionization in the upper troposphere, can dissociate DMS and generate a variety of anion fragments, e.g., H−, CH2−, CH3−, S−, SH−, SCH2− and SCH3− as well as their neutral counterparts, e.g., CH3SCH2, HSCH3, SCH3, (CH3)2, CH2CH3, CH4, CH3, respectively. The ions H−, CH2− and CH3− arise from dissociative electron attachment (DEA) below 13 eV and from direct dipolar dissociation above that energy. The other anions, which contain a sulfur atom, appear to be formed only via DEA. The anion desorption yields for CH3SCH3 adsorbed on water ice were measured between 1 and 18 eV. In units of 10−3 anion per incident electron and per cm3, these yields averaged over the 1–18 eV range are 60 (H−), 0.1 (CH2−), 1.0 (CH3−), 1.2 (S−), 0.1 (SH−), 0.1 (SCH2−) and 0.3 (SCH3−).

掲載誌

Physical Chemistry Chemical Physics

CiteScore: 5.5

自己引用率: 10.3%

年間論文数: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

Dissociation of dimethyl sulfide on water ice initiated by low-energy (<20 eV) electrons

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