亚稳态SO(c^1Σ^-,v′=0)的猝灭动力学  

Studies on the Quenching of SO(c^1Σ^-,v′=0)

作　　者：王鸿梅[1,2] 唐晓闩[1,2] 储焰南[1,2] 周士康[1,2] 

机构地区：[1]中国科学院安徽光学精密机械研究所,环境光谱学实验室 [2]环境光学与技术重点实验室,合肥230031

出　　处：《物理化学学报》2005年第11期1195-1197,共3页Acta Physico-Chimica Sinica

基　　金：中国科学院合肥物质科学研究院院长基金(20020606)资助项目~~

摘　　要：在流动余辉装置上,研究了SO(c1Σ-)的猝灭动力学过程.获得了SO2,O2,CO2,N2,He,CS2,CH3OH,C2H5OH,C3H7OH,C4H9OH,CH3COCH3,C6H6,CH2Cl2,CH2Br2,CHCl3,CCl4等16种分子与SO(c1Σ-)发生猝灭反应的速率常数.初步分析表明:醇类分子CnH2n+1OH(n=1,2,3,4)中的C—H键的数目与其对SO(c1Σ-)的猝灭速率成正比;CO2,N2等非极性无机小分子对SO(c1Σ-)的猝灭作用不明显,强极性分子SO2对SO(c1Σ-)的猝灭作用较强.卤代烷烃中的卤素原子的大小对SO(c1Σ-)的猝灭过程发挥着较重要的作用;而氯代烷烃中氯原子的个数与猝灭速率之间的关系不明显.On a flowing afterglow apparatus, the quenching of SO（c^1∑^-） by SO2, O2, CO2, N2, He, CS2, CH3OH, C2H5OH, C3H7OH, C4H9OH, CH3COCH3, C6H6, CH2Cl2, CH2Br2, CHCl3, or CCl4 was studied firstly and successfully. The quenching rate constants of SO（c^1∑^-） by them were measured. By analysis, it demonstrates that the quenching rate constants of SO（c^1∑^-） by the alkanol molecules, CnH2n＋1OH（n=1, 2, 3, 4）, are semi-proportional to the number of C-H bond in them; the quenching by the non-polar small molecules, such as CO2 and N2 is not efficient; while it is obvious by SO2 because of its strong polarity. The size and volume of halogen atoms in the halomethane molecules play an important role in quenching SO（c^1∑^-）, and it seems that there is no evident correlation between the quenching rate constants and the number of the chlorine atom in the chlomethane molecules.

关 键 词：SO(c^1∑-) 猝灭速率常数 醇类分子 碰撞络合物 动力学 

分 类 号：O643.1[理学—物理化学]