液相OH·，NO3·和SO·4^-与二甲基硫反应机理  

Reaction Mechanism of OH·, NO3· and SO·4^- with Dimethylsulfide in Liquid Phase

作　　者：房豪杰[1] 郑璐[1] 张仁熙[1] 侯惠奇[1] 

机构地区：[1]复旦大学环境科学研究所,上海200433

出　　处：《化学学报》2006年第5期363-366,共4页Acta Chimica Sinica

基　　金：国家自然科学基金(No.20507004)资助项目.

摘　　要：利用激光闪光光解技术研究了液相二甲基硫(DMS)与OH?,NO3i和SOi4-自由基的微观反应机理.实验结果表明:在pH5～9时,OH?氧化DMS生成DMSOH?,DMSOH?会与DMS反应生成(DMS)+2;而NO3i和SOi4-会直接氧化DMS生成DMS+,生成的DMS+会与DMS反应生成(DMS)+2.(DMS)+2与氧气的反应很慢,它的衰减受pH影响较大.The laser flash photolysis technique was employed to study the reactions of dimethylsulfide （DMS） with OH·, NO3· and SO4^·- radicals in solution. During pH 5-9, OH· reacted with DMS to form DMSOH· radical, which then reacted with another DMS molecule to form （DMS）2^＋, however, the oxidation by NO3· and SO4^·- radicals proceeded via one-electron oxidation to form DMS^＋, which could also react with another DMS molecule to form （DMS）2^＋. The decay of （DMS）2^＋ ion was greatly influenced by the pH and its reaction with oxygen was immeasurably slow.

关 键 词：激光闪光光解 液相 二甲基硫 

分 类 号：O643.12[理学—物理化学] TS262.5[理学—化学]