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Imaging CH3SH photodissociation at 204 nm: the SH+CH3 channel
Chen, Zhichao1,2; Shuai, Quan1; Eppink, Andre T. J. B.2; Jiang, Bo1; Dai, Dongxu1; Yang, Xueming1; Parker, David H.2
刊名PHYSICAL CHEMISTRY CHEMICAL PHYSICS
2011
DOI10.1039/c1cp00032b
13期:18页:8531-8536
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
关键词[WOS]INTERNAL ENERGY-DISTRIBUTION ; METHYL MERCAPTAN ; CONICAL INTERSECTIONS ; BIMOLECULAR REACTIONS ; HYDROGEN-SULFIDE ; MOLECULAR-OXYGEN ; STATE ; METHANETHIOL ; DYNAMICS ; SPECTRA
英文摘要The SH + CH3 product channel for the photodissociation of CH3SH at 204 nm was investigated using the sliced velocity map ion imaging technique with the detection of CH3 products using state selective (2 + 1) resonance enhanced multiphoton ionization (REMPI). Images were measured for CH3 formed in the ground and excited vibrational states (v(2) = 0, 1, and 2) of the umbrella mode from which the correlated SH vibrational state distributions were determined. The vibrational distribution of the SH fragment in the SH + CH3 channel at 204 nm is clearly inverted and peaks at v = 1. The highly negative anisotropy parameter of the CH3 (v(2) = 0, 1, and 2) products is indicative of a fast dissociation process for C-S bond cleavage. Two kinds of slower CH3 products were also observed (one of which was partly vibrationally resolved) that are assigned to a two-step photodissociation processes, in which the first step is the production of the CH3S ((XE)-E-2) radical via cleavage of the S-H bond in CH3SH, followed by probe laser photodissociation of nascent CH3S radicals yielding CH3(X(2)A(1), v(2) = 0-2) + S(P-3(j)/D-1) products.
语种英语
WOS记录号WOS:000289954300048
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文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/142415
专题中国科学院大连化学物理研究所
作者单位1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
2.Univ Nijmegen, Dept Mol & Laser Phys, NL-6525 ED Nijmegen, Netherlands
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Chen, Zhichao,Shuai, Quan,Eppink, Andre T. J. B.,et al. Imaging CH3SH photodissociation at 204 nm: the SH+CH3 channel[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2011,13(18):8531-8536.
APA Chen, Zhichao.,Shuai, Quan.,Eppink, Andre T. J. B..,Jiang, Bo.,Dai, Dongxu.,...&Parker, David H..(2011).Imaging CH3SH photodissociation at 204 nm: the SH+CH3 channel.PHYSICAL CHEMISTRY CHEMICAL PHYSICS,13(18),8531-8536.
MLA Chen, Zhichao,et al."Imaging CH3SH photodissociation at 204 nm: the SH+CH3 channel".PHYSICAL CHEMISTRY CHEMICAL PHYSICS 13.18(2011):8531-8536.
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