Ultrafast Internal Conversion Dynamics of Benzyl Chloride by Femtosecond Time-Resolved Photoelectron Imaging

CORC > 武汉物理与数学研究所 > 中国科学院武汉物理与数学研究所 > 原子分子光物理研究部

	Ultrafast Internal Conversion Dynamics of Benzyl Chloride by Femtosecond Time-Resolved Photoelectron Imaging
	Ding Zhong-Hua 1; Qiu Xue-Jun 1; Xu Yan-Qi 1; Wang Yan-Mei 1; Zhang Bing 1
刊名	ACTA PHYSICO-CHIMICA SINICA
	2012-12-01
卷号	28 期号:12 页码:2761-2766
关键词	Benzyl chloride Photoelectron imaging Internal conversion Pump-probe Time-resolved spectroscopy
英文摘要	The ultrafast internal conversion of benzyl chloride (BzCl) was studied with femtosecond time-resolved photoelectron imaging (TRPEI) coupled with time-resolved mass spectroscopy. Time-energy maps of the photoelectron intensity and the angular anisotropy were generated from a series of photoelectron images. Upon absorption of two 400 nm photons, benzyl chloride was excited to the S-4 and S-2 states at the same time. The time evolution of the parent ion with different pump-probe delays can be well described by biexponential decay. The fit yielded T-1=50 fs and T-2=910 fs. By analysis of time-resolved photoelectron kinetic energy distributions, it is concluded that the excited S-4 state has coupled with and decayed to the S-2 state in a short time scale and then converted to the S-1 state through ultrafast internal conversion (IC). Within 50 fs, the molecule electronically relaxes into S-1 through IC and from there, decays to the S-0 ground state with the relatively slow time constant of 910 fs. The anisotropy parameters of photoelectron angular distributions changed from 0.87 at the delay time of 0 fs to 0.94 at 25 fs and then to 0.59 at 190 fs, which also reflects the coupling from the S-4 state to the S-2 state and the following IC to the S-1 state.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Chemistry, Physical
研究领域[WOS]	Chemistry
关键词[WOS]	TERT-BUTYL ALCOHOL ; PHOTOCHEMICAL-TRANSFORMATIONS ; EXCITED-STATES ; SPECTROSCOPY ; PHASE ; VAPOR ; BENZYLCHLORIDE ; ABSORPTION ; PHOTOLYSIS ; MOLECULE
收录类别	SCI
语种	英语
WOS记录号	WOS:000311938700001
公开日期	2016-05-09
内容类型	期刊论文
源URL	[http://ir.wipm.ac.cn/handle/112942/1709]
专题	武汉物理与数学研究所_原子分子光物理研究部
作者单位	1.Chinese Acad Sci, Wuhan Inst Phys & Math, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Ding Zhong-Hua,Qiu Xue-Jun,Xu Yan-Qi,et al. Ultrafast Internal Conversion Dynamics of Benzyl Chloride by Femtosecond Time-Resolved Photoelectron Imaging[J]. ACTA PHYSICO-CHIMICA SINICA,2012,28(12):2761-2766.
APA	Ding Zhong-Hua,Qiu Xue-Jun,Xu Yan-Qi,Wang Yan-Mei,&Zhang Bing.(2012).Ultrafast Internal Conversion Dynamics of Benzyl Chloride by Femtosecond Time-Resolved Photoelectron Imaging.ACTA PHYSICO-CHIMICA SINICA,28(12),2761-2766.
MLA	Ding Zhong-Hua,et al."Ultrafast Internal Conversion Dynamics of Benzyl Chloride by Femtosecond Time-Resolved Photoelectron Imaging".ACTA PHYSICO-CHIMICA SINICA 28.12(2012):2761-2766.