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Crossed-Beams Studies of the Dynamics of the H-Atom Abstraction Reaction, O(P-3) + CH4 -> OH + CH3, at Hyperthermal Collision Energies
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
2011-10-13
DOI10.1021/jp207137t
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
关键词[WOS]SATURATED-HYDROCARBONS ; THEORETICAL INVESTIGATIONS ; SCATTERING DYNAMICS ; CHEMICAL-DYNAMICS ; EXCITATION ; SECTIONS ; METHANE ; CH4 ; COLLISIONS ; SECONDARY
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%.
语种英语
WOS记录号WOS:000295545800008
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被引频次:17[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/142311
专题中国科学院大连化学物理研究所
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
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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.
APA Zhang, Jianming,Lahankar, Sridhar A.,Garton, Donna J.,Minton, Timothy K.,Zhang, Weiqing,&Yang, Xueming.(2011).Crossed-Beams Studies of the Dynamics of the H-Atom Abstraction Reaction, O(P-3) + CH4 -> OH + CH3, at Hyperthermal Collision Energies.JOURNAL OF PHYSICAL CHEMISTRY A,115(40),10894-10902.
MLA Zhang, Jianming,et al."Crossed-Beams Studies of the Dynamics of the H-Atom Abstraction Reaction, O(P-3) + CH4 -> OH + CH3, at Hyperthermal Collision Energies".JOURNAL OF PHYSICAL CHEMISTRY A 115.40(2011):10894-10902.
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