Ultrafast Decay Dynamics of 2-Hydroxypyridine Excited to S1 Electronic State |
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| Authors: | Yan-jun Min Wen-peng Yuan Dong-yuan Yang Dong-xu Dai Sheng-rui Yu Guo-rong Wu Xue-ming Yang |
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| Affiliation: | a.State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Chinab.University of Chinese Academy of Sciences, Beijing 100049, Chinac.Hangzhou Institute of Advanced Studies, Zhejiang Normal University, Hangzhou 311231, China |
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| Abstract: | The S\begin{document}$_1$\end{document} state decay dynamics of 2-hydroxypyridine following UV excitation at a wavelength range of 276.9\begin{document}$-$\end{document}250.0 nm is investigated using femtosecond time-resolved photoelectron imaging technique. Based on pump wavelength dependence of the decay dynamics, a refined decay picture is proposed. At pump wavelength of 276.9 nm, the S\begin{document}$_1$\end{document} state is depopulated through intersystem crossing to lower triplet state(s). At 264.0 nm, both intersystem crossing to lower triplet state(s) and internal conversion to the ground state are in operation. At 250.0 nm, internal conversion to the ground state becomes dominated. |
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| Keywords: | Photoelectron spectrum Pump/probe Femtosecond time-resolved spectrum Excited-state decay dynamics |
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