Citation: LONG Jin-You, LIU Zhi-Ming, QIU Xue-Jun, ZHANG Bing. Ultrafast Nonadiabatic Dynamics of Electronically Excited 2-Methyl Furan[J]. Acta Physico-Chimica Sinica, ;2017, 33(3): 506-512. doi: 10.3866/PKU.WHXB201612061 shu

Ultrafast Nonadiabatic Dynamics of Electronically Excited 2-Methyl Furan

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;
2.
College of Electronics and Information, South-Central University for Nationalities, Wuhan 430074, P. R. China

Received Date: 14 September 2016
Revised Date: 6 December 2016

Fund Project: The project was supported by the National Natural Science Foundation of China (21273274,21303255,11404411)

Excited-state dynamics of 2-methyl furan has been studied by femtosecond time-resolved photoelectron imaging. The molecule 2-methyl furan was simultaneously excited to the n=3 Rydberg series of S₁[¹A"(π3s)], ¹A'(π3p_x), ¹A"(π3p_y) and ¹A"(π3p_z) and the valence state of ¹A'(ππ^*) by two 400 nm photons and subsequently probed by two 800 nm photons. The average lifetime of the Rydberg series and the valence state was measured to be on the time scale of 50 fs by the time-dependent ion yield of the parent ion. Ultrafast internal conversions among these excited states were observed and extracted from the time-dependences of the photoelectron kinetic energy components of these excited states in the photoelectron kinetic energy spectra. Furthermore, it is identified that the ¹A'(ππ^*) state might play an important role in internal conversions among these excited states. The Rydberg-valence mixings, which result in numerous conical intersections, act as the driving force to accomplish such ultrafast internal conversions.
- Ultrafast,
- Photoelectron imaging,
- Nonadiabatic dynamics,
- 2-Methyl furan
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沈阳化工大学材料科学与工程学院沈阳 110142