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

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: 13 August 2012
Fund Project: 国家自然科学基金(91121006)资助项目 (91121006)

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.
- Photoelectron imaging,
- Ultrafast process,
- Internal conversion,
- 2-Chloropyridine
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