Acta Phys. -Chim. Sin. ›› 2012, Vol. 28 ›› Issue (11): 2543-2548.doi: 10.3866/PKU.WHXB201208135

• THERMODYNAMICS, KINETICS, AND STRUCTURAL CHEMISTRY • Previous Articles     Next Articles

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   

  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: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).

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

MSC2000: 

  • O644