Investigation of the cross-reaction mechanism of C_6H_5F-HNO_2 aqueous solution irradiated at 355 nm by transient absorbance spectrum technique

作     者：ZHANG RenXi SHEN Yan LI Ping HUANG Li DONG WenBo HOU HuiQi 

作者机构：Institute of Environmental Science Fudan University Shanghai 200433 China 

出 版 物：《Chinese Science Bulletin》 (CHINESE SCIENCE BULLETIN)

年 卷 期：2008年第53卷第7期

页      面：998-1003页

核心收录：

学科分类：07[理学] 070302[理学-分析化学] 0703[理学-化学] 

基　　金：the National Natural Science Foundation of China (Grant No. 20377009) 

主　　题：溶液作用 瞬变现象 吸收率 光谱学 

摘      要：The transient absorption spectrum technique was employed to investigate the cross-reaction mecha-nism of C6H5F-HNO2 aqueous solution irradiated at 355 nm. The characteristic and the kinetic parame-ters of transient species were also detected. Hydroxyl radical derived from the photolysis of HNO2 was added to monofluorobenzene with a second-order rate constant of (5.83±0.17)×109 L·mol-1·s-1 to form an adduct, C6H5F···OH, which was able to react with HNO2 as the main reaction pathway with a rate constant of (8.3±0.1)×107 L·mol-1·s-1. The C6F6···OH adduct can also be decayed by elimination of H2O to yield monofluorophenyl radical C6H4F·. By GC-MS technique, the final products were identified to be monofluorophenol, nitro-monofluorobenzene, nitro-monofluorophenol and para-fluorobiphenyl.