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

作者机构：Institute of Atomic and Molecular PhysicsJilin UniversityChangchun 130012China Jilin Provincial Key Laboratory of Applied Atomic and Molecular SpectroscopyJilin UniversityChangchun 130012China 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2024年第41卷第5期

页      面：17-22页

核心收录：

学科分类：081702[工学-化学工艺] 080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0817[工学-化学工程与技术] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0803[工学-光学工程] 

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

主　　题：pump Femto adiabatic 

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.