华中科技大学学报（自然科学版）2025，Vol.53Issue(9)：59-64,6.DOI:10.13245/j.hust.250770
二氯亚砜超快三体解离动力学研究
Study of ultrafast three-body photodissociation of sulfurous dichloride with UV excitation
摘要
Abstract
The ultrafast photodissociation dynamics of sulfurous dichloride with 200～255 nm UV excitation was studied by femtosecond time-resolved mass spectrometry.The observed photolysis products are mainly from the three-body dissociation channel,and the contributions of molecular and free radical channels are small.Comparing the rising time of the SO and Cl products,it can be seen that a simultaneous fission of the second S-Cl bond could take place when the critical length for the first S-Cl bond cleavage was reached and the two S-Cl bond fission should occur within a fraction of rotational period.This three-body dissociation is so called asynchronous concerted reaction.At 200 nm excitation,no parent ion signal was observed in the mass spectra due to the shorter excited state lifetime.By comparing the intensities of the different product ions at 200～255 nm excitation,great difference has been shown in the product yields.关键词
超快动力学/光解/三体解离/协同反应/时间分辨质谱Key words
ultrafast dynamics/photodissociation/three-body dissociation/concerted reaction/time-resolved mass spectrometry分类
数理科学引用本文复制引用
曹玲,王艳梅,张嵩..二氯亚砜超快三体解离动力学研究[J].华中科技大学学报（自然科学版）,2025,53(9):59-64,6.基金项目
国家自然科学基金资助项目(22273116,12274418) （22273116,12274418）
武汉市知识创新专项基金资助项目(2022010801010134). （2022010801010134）
