S. Sorensen et al., OBSERVATION OF DMSO AND CH3S(O)OH FROM THE GAS-PHASE REACTION BETWEENDMS AND OH, Journal of atmospheric chemistry, 24(3), 1996, pp. 299-315
Products and mechanisms have been investigated for the reactions betwe
en dimethylsulfide (DMS) and dimethylsulfoxide (DMSO) and the hydroxyl
radical (OH) in the presence of NOx. All of the experiments were perf
ormed in a 480 L reaction chamber, applying Fourier transform infrared
spectroscopy (FT-IR) and ion chromatography as the analytical techniq
ues. In addition to the sulfur containing products that are known to b
e produced from the gas phase reaction between DMS and OH (SO2, dimeth
ylsulfone, methylsulfonyl peroxynitrate, methanesulfonic acid, H2SO4),
DMSO and methanesulfinic acid (CH3S(O)OH) were also observed as produ
cts. Only SO2, DMSO(2) and methylsulfonyl peroxynitrate were found as
sulfur containing products in the reaction between DMSO and OH. Based
on these new results we propose a mechanism for the atmospheric oxidat
ion of DMS and DMSO by OH radical.