Study on the reaction of carbon disulfide with hydroxyl radical in aqueous solution  

作　　者：FANG Haojie OUYANG Bin QIN Yan DONG Wenbo HOU Huiqi 

机构地区：[1]Environment Science Institute, Fudan University, Shanghai 200433, China [2]School of Environmental Science and Engineering, Donghua University, Shanghai 200051, China

出　　处：《Chinese Science Bulletin》2005年第24期2832-2835,共4页

基　　金：supported by the National Natural Science Foundation of China(Grant No.29877005).

摘　　要：The laser flash photolysis technique is em- ployed to investigate the reaction mechanism of CS2 with ·OH in the nitrogen-saturated aqueous solution. By comparison of the transient absorption spectra obtained at different phases and pHs and through the addition of proper radical cation scavenger, CS2 is determined to react with ·OH to form ·CS2OH adduct, instead of the CS2+ radical cation. At pH 1―5, ·CS2OH decomposes into COS and ·HS, while at pH>5, it further reacts with OH- to form CS2O-. The tem- perature dependent kinetics for the reaction CS2 + ·OH → ·CS2OH is also reported in this paper with an estimated activation energy of (26.9±1.0) kJ·mol?1.The laser flash photolysis technique is employed to investigate the reaction mechanism of CS2 with -OH in the nitrogen-saturated aqueous solution. By comparison of the transient absorption spectra obtained at different phases and pHs and through the addition of proper radical cation scavenger, CS2 is determined to react with -OH to form ·CS2OH adduct, instead of the CS2^＋ radical cation. At pH 1--5, ·CS2OH decomposes into COS and -HS, while at pH〉5, it further reacts with OH^- to form CS2O^-. The temperature dependent kinetics for the reaction CS2^ ＋ .OH · →CS2OH is also reported in this paper with an estimated activation energy of （26.9 ± 1.0） kJ·mol^-1.

关 键 词：激光闪光光解 二硫化碳 羟基 反应机理 水溶液 

分 类 号：O643.12[理学—物理化学]