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@ARTICLE{Kuo:889015,
author = {Kuo, Mei-Tsan and Weber, Isabelle and Fittschen, Christa
and Vereecken, Luc and Lin, Jim Jr-Min},
title = {{K}inetics of dimethyl sulfide ({DMS}) reactions with
isoprene-derived {C}riegee intermediates studied with direct
{UV} absorption},
journal = {Atmospheric chemistry and physics},
volume = {20},
number = {21},
issn = {1680-7324},
address = {Katlenburg-Lindau},
publisher = {EGU},
reportid = {FZJ-2020-05389},
pages = {12983 - 12993},
year = {2020},
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. (2015) reported high reactivity of
isoprene-derived Criegee ntermediates 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 the 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 the
rate coefficient reported by Newland et al. (2015) 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.},
cin = {IEK-8},
ddc = {550},
cid = {I:(DE-Juel1)IEK-8-20101013},
pnm = {243 - Tropospheric trace substances and their
transformation processes (POF3-243)},
pid = {G:(DE-HGF)POF3-243},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000587304600001},
doi = {10.5194/acp-20-12983-2020},
url = {https://juser.fz-juelich.de/record/889015},
}