Direct Detection of S(3P) and S(1D) Generated in the O(1D) + OCS Reaction: Mechanism of the Formation of S2 (X 3∑g and a1Δg)
Direct Detection of S(3P) and S(1D) Generated in the O(1D) + OCS Reaction: Mechanism of the Formation of S2 (X 3∑g and a1Δg)
复制标题
直接检测O(1D) + OCS反应中生成的S(3P)和S(1D)：S2（X 3Σg和a1Δg）的形成机制
DOI：
10.1021/acs.jpca.7b11375
复制
发表时间：
2018
影响因子：
2.9
通讯作者：
and Katsuyoshi Yamasaki
中科院分区：
文献类型：
--
作者：
Haruka Tanimoto;Shogo Tendo;Kenichi Orimi;Hiroki Goto;Hiroshi Kohguchi;and Katsuyoshi Yamasaki
Highly vibrationally excited disulfur S2in the X3Σg–and a1Δgstates has been detected in the gaseous mixture of O3and OCS irradiated with light at 266 nm. Generation of CO2in the reaction system has been reported; however, no direct detection of sulfur atoms (S(3P) and S(1D)) has been made. In the present study, we have employed the two-photon laser-induced fluorescence (2P-LIF) technique to detect S(3P) and S(1D) directly and recorded the time profiles of the atoms at varying pressures of OCS. Kinetic analyses of the profiles show that (i) S(1D) is generated in the O(1D) + OCS reaction and consumed by the S(1D) + OCS reaction, and (ii) S(3P) is mainly generated in the O(1D) + OCS reaction instead of quenching of S(1D) by collisions with OCS and ambient gases. The vibrational levelsv= 19 and 10 of the respective electronic states X3Σg–and a1Δgof S2were detected in the O3/OCS/266 nm system. The two vibrational levels cannot be generated by the available energy of the S(3P) + OCS reaction, giving evidence that S2in the X3Σg–and a1Δgstates are generated by the S(1D) + OCS reaction.
