飞秒时间分辨的光电子影像技术研究2-氯吡啶超快内转换动力学

doi:10.3866/PKU.WHXB201208135

物理化学学报 >> 2012, Vol. 28 >> Issue (11): 2543-2548.doi: 10.3866/PKU.WHXB201208135

飞秒时间分辨的光电子影像技术研究2-氯吡啶超快内转换动力学

GHAZAL Ahmed-Yousif, 邱学军, 秦朝朝, 龙金友, 布玛丽亚·阿布力米提, 张冰

中国科学院武汉物理与数学研究所, 波谱与原子分子物理国家重点实验室, 武汉 430071; 中国科学院研究生院, 北京 100049

收稿日期:2012-06-26 修回日期:2012-08-13 发布日期:2012-10-17
通讯作者: 张冰 E-mail:bzhang@wipm.ac.cn
基金资助:
国家自然科学基金(91121006)资助项目

Ultrafast Internal Conversion Dynamics of 2-Chloropyridine by Femtosecond Time-Resolved Photoelectron Imaging

GHAZAl Ahmed-Yousif, QIU Xue-Jun, QIN Chao-Chao, LONG Jin-You, ABULIMITI Bumaliya, ZHANG Bing

State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, P. R. China; Graduate University of Chinese Academy of Sciences, Beijing 100049, P. R. China

Received:2012-06-26 Revised:2012-08-13 Published:2012-10-17
Supported by:
The project was supported by the National Natural Science Foundation of China (91121006).

摘要/Abstract

摘要：

利用时间分辨的飞秒光电子影像技术结合时间分辨的质谱技术, 研究了2-氯吡啶分子激发态的超快过程. 实时观察到了2-氯吡啶分子第二激发态(S₂)向第一激发态(S₁)高振动能级的的超快内转换过程，该内转换的时间常数为(162±5)fs. 实验结果表明, 通过S₂/S₀的锥形交叉衰减到基态的衰减通道也是退布居的重要通道, 其时间尺度为(5.5±0.3) ps.

关键词: 光电子影像, 超快过程, 内转换, 2-氯吡啶

Abstract:

Ultrafast internal conversion dynamics of 2-chloropyridine were studied by femtosecond time-resolved photoelectron imaging spectroscopy coupled with time-resolved mass spectroscopy. The ultrafast internal conversion from the second excited state (S₂) to the first excited state (S₁) via an adjacent conical intersection within (162±5) fs was clearly observed from the time-dependence of the photoelectron spectra. The subsequent deactivations involved the coupling of S₂/S₀ (the ground state) and S₁/S₀ conical intersections, which occurred on a timescale of about (5.5±0.3) ps, and led to the internal conversion to the ground state from the S₂ and S₁ states.

Key words: Photoelectron imaging, Ultrafast process, Internal conversion, 2-Chloropyridine

GHAZAL Ahmed-Yousif, 邱学军, 秦朝朝, 龙金友, 布玛丽亚·阿布力米提, 张冰. 飞秒时间分辨的光电子影像技术研究2-氯吡啶超快内转换动力学[J]. 物理化学学报, 2012, 28(11), 2543-2548. doi: 10.3866/PKU.WHXB201208135

GHAZAl Ahmed-Yousif, QIU Xue-Jun, QIN Chao-Chao, LONG Jin-You, ABULIMITI Bumaliya, ZHANG Bing. Ultrafast Internal Conversion Dynamics of 2-Chloropyridine by Femtosecond Time-Resolved Photoelectron Imaging[J]. Acta Phys. -Chim. Sin. 2012, 28(11), 2543-2548. doi: 10.3866/PKU.WHXB201208135

链接本文: https://www.whxb.pku.edu.cn/CN/10.3866/PKU.WHXB201208135

https://www.whxb.pku.edu.cn/CN/Y2012/V28/I11/2543

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飞秒时间分辨的光电子影像技术研究2-氯吡啶超快内转换动力学

Ultrafast Internal Conversion Dynamics of 2-Chloropyridine by Femtosecond Time-Resolved Photoelectron Imaging

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