Direct Observation on H-Elimination Enhancement from C_(2)H_(4) through Non-Adiabatic Process by Femtosecond Laser Induced Coulomb Explosion  

作　　者：金无维 王春成 赵晓戈 杨译章 任殿相 刘泽槿 李孝开 罗嗣佐 丁大军 Wuwei Jin;Chuncheng Wang;Xiaoge Zhao;Yizhang Yang;Dianxiang Ren;Zejin Liu;Xiaokai Li;Sizuo Luo;Dajun Ding(Institute of Atomic and Molecular Physics,Jilin University,Changchun 130012,China;Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy,Jilin University,Changchun 130012,China)

机构地区：[1]Institute of Atomic and Molecular Physics,Jilin University,Changchun 130012,China [2]Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy,Jilin University,Changchun 130012,China

出　　处：《Chinese Physics Letters》2024年第5期17-22,共6页中国物理快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 12134005, 92261201, and 12274179)。

摘　　要：Ethylene, the simplest model of a carbon-carbon double bond system, is pivotal in numerous chemical and biological processes. By employing intense infrared laser pump-probe techniques alongside coincidence measurements, we investigate the ultrafast non-adiabatic dynamics involved in the breakage of carbon-carbon double bonds and hydrogen elimination in dissociation of ethylene. Our study entails analyzing the dynamic kinetic energy release spectra to assess three bond-breaking scenarios, movements of nuclei, and structural changes around the carbon atoms. This allows us to evaluate the relaxation dynamics and characteristics of various dissociative states. Notably, we observe a significant rise in the yield of fragments resulting from C–H bond breakage with the delay time extended, suggesting non-adiabatic coupling through conical intersections from C–C bond breakage as a probable cause.

关 键 词：PUMP FEMTO ADIABATIC 

分 类 号：TN249[电子电信—物理电子学] TQ221.211[化学工程—有机化工]