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题名: Collision time of a triatomic chemical reaction A plus BC
作者: He, Xiaohu1, 2, 3;  Chao (Wu), Victor Wei-Keh4;  Han, Keli1;  Hao, Ce5;  Zhang, Yan1
关键词: collision time ;  total distance ;  reactive probability distribution ;  direct and indirect reaction
刊名: CANADIAN JOURNAL OF CHEMISTRY
发表日期: 2015-06-01
DOI: 10.1139/cjc-2014-0527
卷: 93, 期:6, 页:607-614
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 collision time is an important quantity of an elementary chemical reaction and describes the speed of the collision process in a collision reaction. In this study, we present a generalized method to calculate the collision time of a triatomic reaction in which the collision time is defined by the sum of the incoming time, the intermediate complex time, and the outgoing time. Two variables including the total distance R-total and R-avg, the average value of R-total over time, are used to compute the three components of the collision time. We compute three triatomic reactions including Ca + HCl -> CaCl + H, O + HCl -> OH + Cl/OCl + H, and O + HF -> OH + F at different collision energies and initial diatomic vibrational levels using the quasi-classical trajectory method to confirm that the method could be reliable and reasonable. The time evolutions of R-total could efficiently classify the direct and indirect reactive mechanisms and reveal a distinct discrepancy of the two mechanisms. As the collision energy and initial diatomic vibrational level increase, the percentage of direct reaction trajectories increases. At the same time, the average and maximal values of collision time decrease. Comparing the maximal collision time and the reactive probability distributions of the products, it could be found that most reactive trajectories' collision time is less than 2 ps. Moreover, the present calculations indicate that the method could be applicable to estimate the lifetime of the intermediate complex for the reaction systems with deep potential wells and the collision time of the reactions with a direct abstraction mechanism.
关键词[WOS]: PRODUCT ROTATIONAL POLARIZATION ;  POTENTIAL-ENERGY SURFACE ;  PLANE-WAVE PACKET ;  INITIATED BIMOLECULAR REACTIONS ;  QUANTUM SCATTERING ;  CROSS-SECTIONS ;  REACTION DYNAMICS ;  DIATOM REACTIONS ;  MECHANISM ;  O(D-1)+HF
语种: 英语
WOS记录号: WOS:000355253700005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/146275
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.Dalian Inst Chem Phys, Chinese Acad Sci, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
2.Dalian Univ Technol, Sch Chem Engn, Dalian 116023, Peoples R China
3.Univ Chinese Acad Sci, Beijing, Peoples R China
4.Natl Kaohsiung Univ Appl Sci, Dept Chem & Mat Engn, Kaohsiung 807, Taiwan
5.Dalian Univ Technol, Sch Chem Engn, Dalian 116023, Peoples R China

Recommended Citation:
He, Xiaohu,Chao ,Han, Keli,et al. Collision time of a triatomic chemical reaction A plus BC[J]. CANADIAN JOURNAL OF CHEMISTRY,2015,93(6):607-614.
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