物理化学学报Issue(9)：1662-1666,5.DOI:10.3866/PKU.WHXB201507061
飞秒时间分辨的光电子谱对苯S2态的超快动力学研究
Ultrafast Dynamics of Benzene on theS2 State Investigated by Femtosecond Time-Resolved Photoelectron Spectroscopy
摘要
Abstract
The ultrafast dynamics of benzene on theS2 state have been investigated by femtosecond time-resolved mass spectroscopy coupled with photoelectron imaging. The benzene molecule was excited to theS2 state by two 400 nm photons, and subsequently probed by one 267 nm photon. The time-dependent ion yield of the parent ion consists of two components with different lifetimes. The first component at (90 ± 1) fs is because of internal conversion from theS2 state to theS1/S0 state. The second one, i.e., (5.0 ± 0.2) ps, is due to decay of theS1 state. The observed lifetime of the second component is shorter than previous results, indicating the existence of an additional decay process. With photoelectron spectra extracted from the time-resolved photoelectron imaging, this newly found deactivated process is assigned to intersystem crossing from the vibrational excitedS1 state to the hot triplet stateT3.关键词
时间分辨/光电子能谱/苯分子/内转换/系间交叉Key words
Time-resolved/Photoelectron spectroscopy/Benzene molecule/Internal conversion/Intersystem crossing分类
化学化工引用本文复制引用
沈环,张冰..飞秒时间分辨的光电子谱对苯S2态的超快动力学研究[J].物理化学学报,2015,(9):1662-1666,5.基金项目
The project was supported by the National Natural Science Foundation of China (21403080).国家自然科学基金(21403080)资助项目 （21403080）
