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题名: A kinetic study of the CH2OO Criegee intermediate reaction with SO2, (H2O)(2), CH2I2 and I atoms using OH laser induced fluorescence
作者: Liu, Yiqiang1, 2;  Liu, Fenghua1;  Liu, Siyue1, 2;  Dai, Dongxu1;  Dong, Wenrui1;  Yang, Xueming1
刊名: PHYSICAL CHEMISTRY CHEMICAL PHYSICS
发表日期: 2017-08-21
DOI: 10.1039/c7cp04336h
卷: 19, 期:31, 页:20786-20794
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical ;  Physics, Atomic, Molecular & Chemical
研究领域[WOS]: Chemistry ;  Physics
英文摘要: The OH laser induced fluorescence method was used to study the kinetics of CH2OO reacting with SO2, (H2O)(2), CH2I2 and I atoms. Decay of CH2OO is not strictly first-order since its self-reaction is rapid. With this consideration, we derived the rate coefficient of CH2OO + SO2/(H2O)(2)/CH2I2/I taking into account the contribution of the CH2OO self-reaction. For the CH2OO + SO2 reaction, the rate coefficient is measured to be (3.88 +/- 0.13) x 10(11) cm(3) molecule (1) s (1) at 10 Torr, which agrees very well with a previously reported value obtained by directly monitoring CH2OO using the UV absorption method with the CH2OO self-reaction considered. We did not observe obvious evidence for SO2 catalysed CH2OO isomerization or the intersystem crossing effect in this reaction. CH2OO + (H2O)(2) is supposed to account for the major sink of CH2OO in the atmosphere, but previous rate coefficient measurements were not in good agreement. We have revisited this reaction including the self-reaction of CH2OO and obtained the rate coefficient to be (7.53 +/- 0.38) x 10(12) cm(3) molecule(-1) s(-1) at 60 Torr and 300 K. The rate coefficients of CH2OO + CH2I2 and CH2OO + I were measured to be (5.2 +/- 2.6) x 10(-14) and (2.2 +/- 1.1) x 10 (-12) cm(3) molecule(-1) s(-1) respectively.
关键词[WOS]: GAS-PHASE REACTIONS ;  CONFORMER-DEPENDENT REACTIVITY ;  SUBSTITUTED CARBONYL OXIDES ;  ABSORPTION CROSS-SECTIONS ;  OZONE-ALKENE REACTION ;  WATER-VAPOR ;  ATMOSPHERIC IMPLICATIONS ;  TEMPERATURE-DEPENDENCE ;  INFRARED DETECTION ;  RADICAL PRODUCTION
语种: 英语
WOS记录号: WOS:000407763700049
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/149834
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Liaoning, Peoples R China
2.Dalian Univ Technol, Sch Phys & Optoelect Engn, Dalian 116023, Liaoning, Peoples R China

Recommended Citation:
Liu, Yiqiang,Liu, Fenghua,Liu, Siyue,et al. A kinetic study of the CH2OO Criegee intermediate reaction with SO2, (H2O)(2), CH2I2 and I atoms using OH laser induced fluorescence[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2017,19(31):20786-20794.
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