气候变化领域集成服务门户(CCPortal): Kinetics of dimethyl sulfide (DMS) reactions with isoprene-derived Criegee intermediates studied with direct UV absorption

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DOI	10.5194/acp-20-12983-2020
	Kinetics of dimethyl sulfide (DMS) reactions with isoprene-derived Criegee intermediates studied with direct UV absorption
	Kuo M.-T.; Weber I.; Fittschen C.; Vereecken L.; Jr-Min Lin J.
发表日期	2020
ISSN	16807316
起始页码	12983
结束页码	12993
卷号	20 期号:21
英文摘要	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 intermediates towards dimethyl sulfide (DMS) relative to that towards SO2 with the ratio of the rate coefficients kDMSCCI=kSO2CCI D3.51.8. 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. © Author(s) 2020. This work is distributed under the Creative Commons Attribution 4.0 License.
语种	英语
scopus关键词	absorption; atmospheric chemistry; concentration (composition); dimethylsulfide; isoprene; reaction kinetics; ultraviolet radiation
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/143840
作者单位	Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 10617, Taiwan; Univ. Lille, Cnrs, Umr 8522 - PC2A - Physicochimie des Processus de Combustion et de l'Atmosphère, Lille, 59000, France; Atmospheric Chemistry Department, Max Planck Institute for Chemistry, Hahn-Meitner-Weg 1, Mainz, 55128, Germany; Institute for Energy and Climate Research, IEK-8: Troposphere, Forschungszentrum Jülich GmbH, Jülich, 52428, Germany; Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan; Present Address: Department of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University, Hsinchu, 30010, Taiwan
推荐引用方式 GB/T 7714	Kuo M.-T.,Weber I.,Fittschen C.,et al. Kinetics of dimethyl sulfide (DMS) reactions with isoprene-derived Criegee intermediates studied with direct UV absorption[J],2020,20(21).
APA	Kuo M.-T.,Weber I.,Fittschen C.,Vereecken L.,&Jr-Min Lin J..(2020).Kinetics of dimethyl sulfide (DMS) reactions with isoprene-derived Criegee intermediates studied with direct UV absorption.Atmospheric Chemistry and Physics,20(21).
MLA	Kuo M.-T.,et al."Kinetics of dimethyl sulfide (DMS) reactions with isoprene-derived Criegee intermediates studied with direct UV absorption".Atmospheric Chemistry and Physics 20.21(2020).