| 邻二氯苯激发态动力学 |
| |
| 作者单位： | 1. School of Physics and Electronic Technology, Liaoning Normal University, Dalian 116029, Liaoning Province, P. R. China;2. College of Physics and Materials Engineering, Dalian Nationalities University, Dalian 116600, Liaoning Province, P. R. China;3. State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning Province, P. R. China |
| |
| 基金项目： | the National Natural Science Foundation of China(21303199) |
| |
| 摘 要： |
|
| 关 键 词： | 邻二氯苯 振动激发 光电子成像 光电子能谱 |
| 收稿时间： | 2015-04-07 |
Dynamics of Excited o-Dichlorobenzene |
| |
| Authors: | Xiao-Ying LI Li WANG Yan-Qiu WANG Zhe SONG Ben-Kang LIU |
| |
| Institution: | 1. School of Physics and Electronic Technology, Liaoning Normal University, Dalian 116029, Liaoning Province, P. R. China;2. College of Physics and Materials Engineering, Dalian Nationalities University, Dalian 116600, Liaoning Province, P. R. China;3. State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning Province, P. R. China |
| |
| Abstract: | The dynamics of the first excited singlet electronic state (S1) of o-dichlorobenzene was investigated in real time by the femtosecond pump-probe method combined with time-of-flight mass spectroscopy and the photoelectron velocity mapping technique. The lifetime of the S1 vibrational ground state was determined experimentally to be (651 ± 10) ps, corresponding to the intersystem crossing process from the S1 state to the triplet state. Two decay channels were found in the S1 vibrationally excited mode 9a218a2. The fast process (lifetime constant (458 ± 12) fs) is because of the internal conversion from the S1 vibrationally excited mode to the highly vibrationally excited ground state (S0). The slow process (lifetime constant (90 ± 10) ps) is attributed to the intersystem crossing process from the S1 state to the triplet state (T1). Photoelectrons with long lifetime characteristics in the spectrum might be connected with the intersystem crossing process. Enhanced spinorbital coupling in the S1 highly vibrationally excited state accelerates the intersystem crossing process. |
| |
| Keywords: | o-Dichlorobenzene Vibrational excitation Photoelectron imaging Photoelectron kinetic energy spectrum |
|
| 点击此处可从《物理化学学报》浏览原始摘要信息 |
| 点击此处可从《物理化学学报》下载免费的PDF全文 |
|
