Acta Phys. -Chim. Sin. ›› 2017, Vol. 33 ›› Issue (3): 506-512.doi: 10.3866/PKU.WHXB201612061

• ARTICLE • Previous Articles     Next Articles

Ultrafast Nonadiabatic Dynamics of Electronically Excited 2-Methyl Furan

Jin-You LONG1,Zhi-Ming LIU1,Xue-Jun QIU1,2,Bing ZHANG1,*()   

  1. 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:2016-09-14 Published:2017-03-07
  • Contact: Bing ZHANG E-mail:bzhang@wipm.ac.cn
  • Supported by:
    the National Natural Science Foundation of China(21273274);the National Natural Science Foundation of China(21303255);the National Natural Science Foundation of China(11404411)

Abstract:

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'(π3px), 1A"(π3py) and 1A"(π3pz) 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.

Key words: Ultrafast, Photoelectron imaging, Nonadiabatic dynamics, 2-Methyl furan

MSC2000: 

  • O644