二甲基硫醚的光解特性  

STUDY ON THE CHARACTERS OF PHOTOLYSIS OF DIMETHYL SULFIDE

作　　者：杨文襄[1] 钟晋贤[1] 牟玉静[1] 王淑琴[1] 陈大舟 

机构地区：[1]中国科学院生态环境研究中心,中国标准物质研究中心

出　　处：《感光科学与光化学》1996年第4期298-305,共8页Photographic Science and Photochemistry

基　　金：国家自然科学基金

摘　　要：本文对二甲基硫醚（ＤＭＳ）在有氧、无氧及有Ｈ_２Ｏ_２存在的情况下紫外光辐照．然后在２０ｍ长光程池中藉富里叶红外光谱仪测定光解产物的吸收光谱．实验表明在无氧的情况下ＤＭＳ的Ｃ─Ｓ键断裂，并生成ＣＨ_３ＳＳＣＨ_３及Ｃ_２Ｈ_６，在有氧存在下生成ＨＣＨＯ及ＣＨ_３ＳＯ_３Ｈ，在有Ｈ_２Ｏ_２存在下生成ＣＨ_３ＳＳＣＨ_３．本文讨论了光解的可能机理，合理地解释光解产物的生成．The dimethyl sulfide(DMS) was irradiated by UV in the absence or presence of O_2 and H_2O_2.The products of photolysis were detected by a Fourier Transform Infrared Spectroscopy equipped with a 20m long path cell. The results indicate that the C─S bond of DMS could be broken in the absence of O_2. As a result, CH_3SSCH_3 and CH_3CH_3 compounds were formed. In the case of presence of O_2 in the system,CH2O and CH_3SO_H could be formed. If H_2O_2 presents in the system, the products of photolysis of DMS would be CH_3SO_3H and CH_3SSCH_3. The mechanism of photolysis of DMS has been discussed. According to this mechanism, the formation of products can be explained.

关 键 词：甲基硫醚 红外光谱 光解 辐照 

分 类 号：O623.82[理学—有机化学]