Xue-jun Qiu, Rong-shu Zhu, Yan-qi Xu, Abulimiti Bumaliya, Song Zhang, Bing Zhang. Ultrafast Dynamics Through Conical Intersections in 2,6-dimethylpyridine Studied with Time-resolved Photoelectron Imaging[J]. Chinese Journal of Chemical Physics , 2011, 24(5): 551-556. doi: 10.1088/1674-0068/24/05/551-556
Citation: Xue-jun Qiu, Rong-shu Zhu, Yan-qi Xu, Abulimiti Bumaliya, Song Zhang, Bing Zhang. Ultrafast Dynamics Through Conical Intersections in 2,6-dimethylpyridine Studied with Time-resolved Photoelectron Imaging[J]. Chinese Journal of Chemical Physics , 2011, 24(5): 551-556. doi: 10.1088/1674-0068/24/05/551-556

Ultrafast Dynamics Through Conical Intersections in 2,6-dimethylpyridine Studied with Time-resolved Photoelectron Imaging

doi: 10.1088/1674-0068/24/05/551-556
Funds:  This work was supported by the National Nat-ural Science Foundation of China (No.10704083), the Innovation Foundation of Chinese Academy of Sciences (No.KJCX1-YW-N30), and the Pub-lic Science and Technology Program of Shenzhen (No.SY200806260026A).
  • Received Date: 2011-08-02
  • The ultrafast dynamics through conical intersections in 2,6-dimethylpyridine has been stud-ied by femtosecond time-resolved photoelectron imaging coupled with time-resolved mass spectroscopy. Upon absorption of 266 nm pump laser, 2,6-dimethylpyridine is excited to the S2 state with a ππ* character from S0state. The time evolution of the parent ion sig-nals consists of two exponential decays. One is a fast component on a timescale of 635 fs and the other is a slow component with a timescale of 4.37 ps. Time-dependent photo-electron angular distributions and energy-resolved photoelectron spectroscopy are extracted from time-resolved photoelectron imaging and provide the evolutive information of S2 state. In brief, the ultrafast component is a population transfer from S2 to S1 through the S2/S1 conical intersections, the slow component is attributed to simultaneous IC from the S2 state and the higher vibrational levels of S1 state to S0 state, which involves the coupling of S2/S0 and S1/S0 conical intersections. Additionally, the observed ultrafast S2→S1 transition occurs only with an 18% branching ratio.
  • 加载中
  • 加载中
通讯作者: 陈斌, bchen63@163.com
  • 1. 

    沈阳化工大学材料科学与工程学院 沈阳 110142

  1. 本站搜索
  2. 百度学术搜索
  3. 万方数据库搜索
  4. CNKI搜索

Article Metrics

Article views(2052) PDF downloads(1577) Cited by()

Proportional views
Related

Ultrafast Dynamics Through Conical Intersections in 2,6-dimethylpyridine Studied with Time-resolved Photoelectron Imaging

doi: 10.1088/1674-0068/24/05/551-556
Funds:  This work was supported by the National Nat-ural Science Foundation of China (No.10704083), the Innovation Foundation of Chinese Academy of Sciences (No.KJCX1-YW-N30), and the Pub-lic Science and Technology Program of Shenzhen (No.SY200806260026A).

Abstract: The ultrafast dynamics through conical intersections in 2,6-dimethylpyridine has been stud-ied by femtosecond time-resolved photoelectron imaging coupled with time-resolved mass spectroscopy. Upon absorption of 266 nm pump laser, 2,6-dimethylpyridine is excited to the S2 state with a ππ* character from S0state. The time evolution of the parent ion sig-nals consists of two exponential decays. One is a fast component on a timescale of 635 fs and the other is a slow component with a timescale of 4.37 ps. Time-dependent photo-electron angular distributions and energy-resolved photoelectron spectroscopy are extracted from time-resolved photoelectron imaging and provide the evolutive information of S2 state. In brief, the ultrafast component is a population transfer from S2 to S1 through the S2/S1 conical intersections, the slow component is attributed to simultaneous IC from the S2 state and the higher vibrational levels of S1 state to S0 state, which involves the coupling of S2/S0 and S1/S0 conical intersections. Additionally, the observed ultrafast S2→S1 transition occurs only with an 18% branching ratio.

Xue-jun Qiu, Rong-shu Zhu, Yan-qi Xu, Abulimiti Bumaliya, Song Zhang, Bing Zhang. Ultrafast Dynamics Through Conical Intersections in 2,6-dimethylpyridine Studied with Time-resolved Photoelectron Imaging[J]. Chinese Journal of Chemical Physics , 2011, 24(5): 551-556. doi: 10.1088/1674-0068/24/05/551-556
Citation: Xue-jun Qiu, Rong-shu Zhu, Yan-qi Xu, Abulimiti Bumaliya, Song Zhang, Bing Zhang. Ultrafast Dynamics Through Conical Intersections in 2,6-dimethylpyridine Studied with Time-resolved Photoelectron Imaging[J]. Chinese Journal of Chemical Physics , 2011, 24(5): 551-556. doi: 10.1088/1674-0068/24/05/551-556

Catalog

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return