物理化学学报2017，Vol.33Issue(3)：506-512,7.DOI:10.3866/PKU.WHXB201612061
2-甲基呋喃分子激发态超快非绝热动力学
Ultrafast Nonadiabatic Dynamics of Electronically Excited 2-Methyl Furan
摘要
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.关键词
超快/光电子影像/非绝热动力学/2-甲基呋喃Key words
Ultrafast/Photoelectron imaging/Nonadiabatic dynamics/2-Methyl furan分类
化学化工引用本文复制引用
龙金友,刘志明,邱学军,张冰..2-甲基呋喃分子激发态超快非绝热动力学[J].物理化学学报,2017,33(3):506-512,7.基金项目
The project was supported by the National Natural Science Foundation of China (21273274,21303255,11404411).国家自然科学基金(21273274,21303255,11404411)资助项目 （21273274,21303255,11404411）
