照相明胶中硫存在形态的XPS研究  

STUDY ON THE CHEMICAL STATE OF SULFUR IN PHOTOGRAPHIC GELATIN BY XPS

作　　者：张宜恒[1] 李洁[1] 闫天堂[1] 俞书勤[1] 庄思永[2,3] 彭必先 

机构地区：[1]中国科学技术大学应用化学系 [2]华东理工大学精细化工研究所 [3]中国科学院感光化学研究所

出　　处：《感光科学与光化学》1998年第4期314-320,共7页Photographic Science and Photochemistry

基　　金：国家自然科学基金

摘　　要：本文采用Ｘ射线光电子能谱技术，研究了国内外典型的两种照相明胶的空白样品、掺杂铁（Ⅲ）的样品中硫元素的存在形态．硫在明胶中主要以三种化学形态存在：蛋氨酸砜中的ＳＯＯ基团，蛋氨酸亚砜中的ＳＯ基团，蛋氨酸中的－Ｓ－基团．三种化学形态间的相对含量基本上反应出蛋氨酸及其两种氧化产物之间的相对比例．在我们的实验条件下，外来三价铁，引发部分蛋氨酸砜被还原为蛋氨酸亚砜，与此同时。In this paper, the chemical state of element sulfur in undoped, doped ferric ion samples of two typical photographic gelatins were studied by X-ray photoelectron spectroscopy. Sulfur of gelatin macromolecule contains three chemical states: S OO group of Metson,S O group of Metsox and -S- of Met. The ratio of these three chemical states reflects the relative amount of Metson, Metsox, Met in gelatin to a certain extent. Under our experimental conditions, the doped ferric ion induce the Metson to be reduced partly to Metsox.Simultaneously -CH 2- groups of gelatin are oxidized partly to CH OH groups.

关 键 词：照相明胶 蛋氨酸 硫 XPS 蛋氨酸亚砜 蛋氨酸砜 

分 类 号：TQ572.2[化学工程—精细化工]