XANES analysis of tribo-chemical and thermal films generating from some organic polysulfides  

作　　者：YI Hongling ZENG Xiangqiong CAO Yan RENTianhui M. Kasrai G. M. Bancroft 

机构地区：[1]School of Chemistry and Chemical Engineering, Shanghai Jiaotong University, Shanghai 200240, China [2]Department of Chemistry, University of Western Ontario, London,Ontario, N6A5B7, Canada

出　　处：《Chinese Science Bulletin》2006年第22期2710-2716,共7页

基　　金：This work was supported by the National Natural Science Foundation of China （Grant No. 20472051）.

摘　　要：X 光检查吸收近的边结构(XANES ) 光谱学第一被用来描绘从烷基，本甲基和包含酰的器官的 polysulfides 产生的 triboehemical 和热电影的化学性质。从这些 polysulfides 产生的热电影主要由 FeSO4l 和烷基化二硫组成，这被发现了也存在在表面下并且从包含酰的 polysulfides 产生的热电影的体积。Undertriboehemical 条件，电影的作文依赖于添加剂的分子结构。也就是，从烷基 polysulfide 产生的 triboehemical 电影由烷基化二硫组成在外面表面， FeSO_4 的混合物， FeS_2 和亚在表面下，并且 FeSO_4in 体积；为本甲基 polysulfide 的 triboehemical 电影的作文由 FeSO4 组成在外面，出现作文在表面下并且体积与烷基 polysulfide.For 一样是包含酰的 polysulfides， triboehemical 电影由烷基化二硫组成在外面表面，和 FeS_2 在表面下并且体积。X-ray absorption near edge structure （XANES） spectroscopy has been firstly used to characterize the chemical nature of tribochemical and thermal films generated from alkyl, benzyl and acylcontaining organic polysulfides. It has been found that the thermal films generated from these polysulfides are mainly composed of FeSO4, and alkyl disulfides also exist in the subsurface and bulk of thermal films generated from acyl-containing polysulfides. Under tribochemical conditions, the composition of film is dependent on the molecular structure of the additives Namely, the tribochemical film generated from alkyl polysulfide is composed of alkyl disulfide in the out surface, a mixture of FeSO4, FeS2 and sulfoxide in the subsurface, and FeSO4 in the bulk; the composition of the tribochemical film for benzyl polysulfide consists of FeSO4in the out surface, while the composition in subsurface and bulk is the same as the alkyl polysulfide. For acyl-containing polysulfides, the tribochemical films consist of alkyl disulfide in the out surface, and FeS2 in the subsurface and bulk.

关 键 词：有机聚硫化物 XANES 薄膜学 X射线吸收 

分 类 号：O62[理学—有机化学]