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题名: Photodissociation dynamics of nitromethane and nitroethane at 266 nm
作者: Yue, Xian-Fang;  Sun, Ju-Iong;  Wei, Qiang;  Yin, Hong-Ming;  Han, Ke-Li
通讯作者: 韩克利
关键词: photodissociation dynamics ;  single-photon laser induced fluorescence ;  nitromethane ;  nitroethane
刊名: CHINESE JOURNAL OF CHEMICAL PHYSICS
发表日期: 2007-08-27
DOI: 10.1088/1674-0068/20/04/401-406
卷: 20, 期:4, 页:401-406
收录类别: SCI
文章类型: Article
部门归属: 11
项目归属: 1101
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Physics, Atomic, Molecular & Chemical
研究领域[WOS]: Physics
英文摘要: Measurements of the nascent OH product from photodissociation of gaseous nitromethane and nitroethane at 266 nm were performed using the single-photon laser induced fluorescence technique. The OH fragment is found to be vibrationally cold for both systems. The rotational state distribution of nitromethane are Boltzmann, with rotational temperature of T-rot=2045 +/- 150 and 1923 +/- 150 K for both (2)Pi(3/2) and (2)Pi(1/2) states, respectively. For nitroethane, the rotational state distribution shows none Boltzmann and cannot be well characterized by a rotational temperature, which indicates the different mechanisms in producing OH radicals from photodissociation of nitromethane and nitroethane. The rotational energy is calculated as 14.36 +/- 0.8 and 4.98 +/- 0.8 kJ/mol for nitromethane and nitroethane, respectively. A preferential population of the low spin-orbit component ((2)Pi(3/2)) is observed for both nitromethane and nitroethane. The dominant population of Pi(+) state in two Lambda-doublet states is also observed for both nitromethane and nitroethane, which indicates that the unpaired pi lobe of the OH fragment is parallel to the plane of rotation.
关键词[WOS]: AB-INITIO ;  CONFIGURATION-INTERACTION ;  NITRITE REARRANGEMENT ;  UV PHOTODISSOCIATION ;  STATE DISTRIBUTIONS ;  METHYL NITRITE ;  S-2 STATE ;  DECOMPOSITION ;  DISSOCIATION ;  OH
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000249465100012
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/98733
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, Peoples R China

Recommended Citation:
Yue, Xian-Fang,Sun, Ju-Iong,Wei, Qiang,et al. Photodissociation dynamics of nitromethane and nitroethane at 266 nm[J]. CHINESE JOURNAL OF CHEMICAL PHYSICS,2007,20(4):401-406.
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