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| Titel |
Exploring the chemical fate of the sulfate radical anion by reaction with sulfur dioxide in the gas phase |
| VerfasserIn |
N. T. Tsona, N. Bork, H. Vehkamäki |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 15, no. 1 ; Nr. 15, no. 1 (2015-01-14), S.495-503 |
| Datensatznummer |
250119308
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| Publikation (Nr.) |
 copernicus.org/acp-15-495-2015.pdf |
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| Zusammenfassung |
| The gas phase reaction between SO4−(H2O)n and
SO2, n = 0–2, is investigated using ab initio
calculations and kinetic modelling. Structures of reactants,
transition states and products are reported. Our calculations
predict that the SO2SO4−(H2O)n cluster ion, which is formed upon
SO2 and SO4−(H2O)n collision, can isomerize to
SO3SO3−(H2O)n. The overall reaction is SO2
oxidation by the SO4−(H2O)n anionic cluster. The results
show that SO4−(H2O)n is a good SO2 oxidant,
especially at low relative humidity, with a reaction rate constant
up to 1.5 × 10−10 cm3 molecule−1s−1. At high relative
humidity, instead, the re-evaporation of SO2 from the
SO2SO4−(H2O)n cluster ion is favoured. |
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