Atmospheric chemistry of dimethyl sulfide: UV spectra and self-reaction kinetics of CH3SCH2 and CH3SCH2O2 radicals and kinetics of the reactions CH3SCH2 + O2 .fwdarw. CH3SCH2O2 and CH3SCH2O2 + NO .fwdarw. CH3SCH2O + NO2

1993 ◽  
Vol 97 (32) ◽  
pp. 8442-8449 ◽  
Author(s):  
Timothy J. Wallington ◽  
Thomas Ellermann ◽  
Ole J. Nielsen
Keyword(s):  
Reaction Kinetics ◽  
Atmospheric Chemistry ◽  
Dimethyl Sulfide ◽  
Uv Spectra ◽  
Kinetics Of

Atmospheric chemistry of E-CF3CH CHCF3: Reaction kinetics of OH radicals and products of OH-initiated oxidation

2018 ◽  
Vol 706 ◽  
pp. 93-98 ◽  
Author(s):  
Feiyao Qing ◽  
Qin Guo ◽  
Liang Chen ◽  
Hengdao Quan ◽  
Junji Mizukado
Keyword(s):  
Reaction Kinetics ◽  
Atmospheric Chemistry ◽  
Oh Radicals ◽  
Kinetics Of

scholarly journals Kinetics of dimethyl sulfide (DMS) reactions with isoprene-derived Criegee intermediates studied with direct UV absorption

2020 ◽  
Author(s):  
Mei-Tsan Kuo ◽  
Isabelle Weber ◽  
Christa Fittschen ◽  
Jim Jr-Min Lin
Keyword(s):  
Atmospheric Chemistry ◽  
Dimethyl Sulfide ◽  
Relative Rate ◽  
Chem Phys ◽  
High Reactivity ◽  
Rate Coefficients ◽  
Visible Absorption ◽  
Criegee Intermediates ◽  
The Individual ◽  
Kinetics Of

Abstract. Criegee intermediates (CIs) are formed in the ozonolysis of unsaturated hydrocarbons and play a role in atmospheric chemistry as a non-photolytic OH source or a strong oxidant. Using a relative rate method in an ozonolysis experiment, Newland et al. [Atmos. Chem. Phys., 15, 9521–9536, 2015] reported high reactivity of isoprene-derived Criegee intermediates towards dimethyl sulfide (DMS) relative to that towards SO2 with the ratio of the rate coefficients kDMS+CI / kSO2+CI = 3.5 ± 1.8. Here we reinvestigated the kinetics of DMS reactions with two major Criegee intermediates formed in isoprene ozonolysis, CH2OO and methyl vinyl ketone oxide (MVKO). The individual CI was prepared following reported photolytic method with suitable (diiodo) precursors in the presence of O2. The concentration of CH2OO or MVKO was monitored directly in real time through their intense UV-visible absorption. Our results indicate the reactions of DMS with CH2OO and MVKO are both very slow; the upper limits of the rate coefficients are 4 orders of magnitude smaller than that reported by Newland et al. These results suggest that the ozonolysis experiment could be complicated such that interpretation should be careful and these CIs would not oxidize atmospheric DMS at any substantial level.

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