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Rate of reaction of OH with COS
Author(s) -
Ravishankara A. R.,
Kreutter N. M.,
Shah R. C.,
Wine P. H.
Publication year - 1980
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl007i011p00861
Subject(s) - flash photolysis , reaction rate constant , photodissociation , kinetics , resonance fluorescence , troposphere , photochemistry , chemistry , chemical kinetics , laser , reaction rate , degradation (telecommunications) , analytical chemistry (journal) , fluorescence , catalysis , optics , environmental chemistry , meteorology , physics , organic chemistry , quantum mechanics , computer science , telecommunications
The laser/flash photolysis‐resonance fluorescence technique was employed to study the kinetics of the reaction OH + COS → k1 products. Complicating secondary reactions involving COS photofragments were eliminated by using 193 nm laser photolysis of HNO 3 as a source of OH. The rate constant was found to be much slower than previous measurements indicated. Based on our experiments, the upper limit for k 1 at 298K is 8.8 × 10 −15 cm³molecule −1 s −1 . Our results suggest that the title reaction is only a minor COS degradation pathway in the troposphere.