高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (10): 1893.

• 研究论文 • 上一篇    下一篇

CS2与亚硝酸水溶液复相体系的激光闪光光解

房豪杰, 欧阳彬, 朱承驻, 董文博, 张仁熙, 潘循皙, 侯惠奇   

  1. 复旦大学环境科学研究所, 上海200433
  • 收稿日期:2003-11-20 出版日期:2004-10-24 发布日期:2004-10-24
  • 基金资助:

    国家自然科学基金(批准号:29877005)资助

Laser Flash Photolysis of CS2-HNO2 Aqueous Solution Complex System

Fang Hao-Jie, OU-YANG Bin, ZHU Cheng-Zhu, DONG Wen-Bo, ZHANG Ren-Xi, PAN Xun-Xi, HOU Hui-Qi   

  1. Institute of Environment Science, Fudan University, Shanghai 200433, China
  • Received:2003-11-20 Online:2004-10-24 Published:2004-10-24

摘要: 利用激光光解-瞬态吸收技术研究了氮气饱和条件下CS2与亚硝酸水溶液复相体系的355nm光解机理.瞬态吸收光谱分析结果表明:CS2与·OH自由基快反应生成CS2OH,产生的CS2OH继续与HONO反应生成CS2OH-HONO加合物,其吸收峰分别为285,305,475,490和980nm,反应CS2OH+HONOCS2OH-HONO的二级速率常数为(2.79±0.05)×108L/(mol·s);230nm处的吸收峰归属为CS2NO+,其一级衰减速率常数为1.28×105s-1.

关键词: 激光闪光光解, HNO2, 瞬态吸收光谱

Abstract: The photolysis mechanism of N 2-saturated CS2-HNO2 aqueous solution was studied by means of the laser-photolysis/transient absorption technique at 355 nm. Spectra analysis shows that the oxidation of CS2 in HNO2 aqueous solution occurs via a complex reaction mechanism.One route is the rapid addiction of ·OH to CS2 to form CS2OH adduct, which successively reacts with HONO to form CS2OH-HONO adduct.Five transient absorption peaks(285, 305, 475, 490 and 980 nm) are attributed to CS2OH-HONO and the rate coefficient for CS2OH+HONO reaction is (2.79±0.05)×108 L/(mol·s). The other reaction route is addiction of NO+ to CS2 to form CS2NO+ adduct which has an absorption peak of 230 nm. The first order decay rate coefficient for CS2NO+ is 1.28×105 s-1.

Key words: Laser flash photolysis, Nitrous acid, Transient absorption spectrum

中图分类号: 

TrendMD: