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

引用本文: 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, doi: 10.3866/PKU.WHXB201208135 shu

Citation: 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 Physico-Chimica Sinica, doi: 10.3866/PKU.WHXB201208135 shu

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

基金项目:
国家自然科学基金(91121006)资助项目 (91121006)

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:

English

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

1.
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 Date: 26 June 2012
Available Online: 17 October 2012
Fund Project:
国家自然科学基金(91121006)资助项目

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:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

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

English

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

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

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

English

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

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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