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题名: Photofragment translational spectroscopy at 304 nm from C-H symmetric stretch excited CH3I [v (1)=1]
作者: Zhou ZhiMin;  Hu LiLi;  Dong ChangWu;  Zhang LiJuan;  Liu Sheng;  Du YiKui;  Cheng Min1;  Zhu QiHe
关键词: photodissociation ;  methyl iodide ;  excited vibrational state ;  photofragment translational spectrum (PTS)
刊名: SCIENCE CHINA-CHEMISTRY
发表日期: 2014-06-01
DOI: 10.1007/s11426-013-5047-x
卷: 57, 期:6, 页:902-910
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: The 304 nm photodissociation of the C-H symmetric stretch excited CH3I [v (1) = 1, v (2) = 0] (v (1) denotes the C-H symmetric stretch mode, and v (2) denotes the umbrella mode) is studied with our simple photofragment translational spectrometer. An IR laser is used to excite the ground state CH3I [0, 0] to the C-H symmetric stretch excited CH3I [1, 0]. With IR laser OFF and ON, the fractions of photofragments CH3 (nu (1), nu (2)) from the 304 nm photodissociation of CH3I [1, 0] have been determined through the photofragment translational spectra (PTS) from measuring I and I* and also through the PTS from measuring CH3 (0, 0) (1, 0) (0, 1) and (1, 1). The experimental results show that the C-H symmetric stretch vibration (v (1) = 1) in parent molecules is about 66% retained in the photofragments in the I channel, but only 24% in the I* channel. The populations of photofragments CH3 (0, 2) and (0, 3) are higher than CH3 (0, 0) and (0, 1), showing strong inverted population both in I and I* channels.
关键词[WOS]: METHYL-IODIDE ;  AB-INITIO ;  PHOTODISSOCIATION ;  DYNAMICS ;  ENERGY ;  BAND ;  RESOLUTION ;  STAR
语种: 英语
WOS记录号: WOS:000336747700015
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/145413
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, Natl Lab Mol Sci, Beijing 100190, Peoples R China
2.Chinese Acad Sci, State Key Lab Mol React Dynam, Beijing 100190, Peoples R China
3.Chinese Acad Sci, Inst Chem, Beijing 100190, Peoples R China

Recommended Citation:
Zhou ZhiMin,Hu LiLi,Dong ChangWu,et al. Photofragment translational spectroscopy at 304 nm from C-H symmetric stretch excited CH3I [v (1)=1][J]. SCIENCE CHINA-CHEMISTRY,2014,57(6):902-910.
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