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题名: Crossed-Beams Studies of the Dynamics of the H-Atom Abstraction Reaction, O(P-3) + CH4 -> OH + CH3, at Hyperthermal Collision Energies
作者: Zhang, Jianming1;  Lahankar, Sridhar A.1;  Garton, Donna J.1;  Minton, Timothy K.1;  Zhang, Weiqing2;  Yang, Xueming2
刊名: JOURNAL OF PHYSICAL CHEMISTRY A
发表日期: 2011-10-13
DOI: 10.1021/jp207137t
卷: 115, 期:40, 页:10894-10902
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 H-atom abstraction reaction, O(P-3) + CH4 -> OH + CH3, has been studied at a hyperthermal collision energy of 64 kcal mol(-1) by two crossed-molecular-beams techniques. The OH products were detected with a rotatable mass spectrometer employing electron-impact ionization, and the CH3 products were detected with the combination of resonance-enhanced multiphoton ionization (REMPI) and time-sliced ion velocity-map imaging. The OH products are mainly formed through a stripping mechanism, in which the reagent O atom approaches the CH4 molecule at large impact parameters and the OH product is scattered in the forward direction: roughly the same direction as the reagent 0 atoms. Most of the available energy is partitioned into product translation. The dominance of the stripping mechanism is a unique feature of such H-atom abstraction reactions at hyperthermal collision energies. In the hyperthermal reaction of O(P-3) with CH4, the H-atom abstraction reaction pathway accounts for 70% of the reactive collisions, while the H-atom elimination pathway to produce OCH3 + H accounts for the other 30%.
关键词[WOS]: SATURATED-HYDROCARBONS ;  THEORETICAL INVESTIGATIONS ;  SCATTERING DYNAMICS ;  CHEMICAL-DYNAMICS ;  EXCITATION ;  SECTIONS ;  METHANE ;  CH4 ;  COLLISIONS ;  SECONDARY
语种: 英语
WOS记录号: WOS:000295545800008
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142311
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.Montana State Univ, Dept Chem & Biochem, Bozeman, MT 59717 USA
2.Chinese Acad Sci, State Key Lab Mol React Dynam, Dalian Inst Chem Phys, Dalian 116023, Liaoning, Peoples R China

Recommended Citation:
Zhang, Jianming,Lahankar, Sridhar A.,Garton, Donna J.,et al. Crossed-Beams Studies of the Dynamics of the H-Atom Abstraction Reaction, O(P-3) + CH4 -> OH + CH3, at Hyperthermal Collision Energies[J]. JOURNAL OF PHYSICAL CHEMISTRY A,2011,115(40):10894-10902.
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