| 照相明胶与化学增感剂相互作用的XPS研究 |
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| 引用本文： | 张宜恒,谭戟,闫天堂,俞书勤,庄思永,彭必先. 照相明胶与化学增感剂相互作用的XPS研究[J]. 影像科学与光化学, 1999, 17(2): 120-127. DOI: 10.7517/j.issn.1674-0475.1999.02.120 |
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| 作者姓名： | 张宜恒 谭戟 闫天堂 俞书勤 庄思永 彭必先 |
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| 作者单位： | 1. 中国科学技术大学应用化学系, 化学物理系, 合肥230026;2. 华东理工大学精细化工研究所, 上海200237;3. 中国科学院感光化学研究所, 北京100101 |
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| 摘 要： | 本文采用X射线光电子能谱技术研究了两种照相明胶与化学增感剂相互作用的机理.当两种照相明胶样品在HAuCl4溶液中反应5min后,明胶中的蛋氨酸、蛋氨酸亚砜均被氧化为蛋氨酸砜.与此同时,明胶吸附的大部分Au3+被还原为Au+,并且Au+以络合形态存在于明胶之中.根据与AuCl3反应之后明胶中Au3+与Au+的比例,法国明胶的还原性略高于包头明胶.添加到明胶中的Na2S2O3能将明胶大分子所含的蛋氨酸亚砜全部还原为蛋氨酸.S2O32-、蛋氨酸和蛋氨酸砜可以稳定共存于明胶体系之中,外加的S2O32-的还原性高于明胶中蛋氨酸、蛋氨酸亚砜的还原性.添加Na2S2O3后的两种照相明胶均可以将其溶胀吸附的Au3+全部还原为胶态金.此时,参与氧化还原反应的主要基团是S2O32-而非明胶中的蛋氨酸残基.由于Na2S2O3的添加,照相明胶对AuCl3的还原能力增强.
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| 关 键 词： | 照相明胶 化学增感剂 X射线光电子能谱 |
| 收稿时间： | 1998-06-18 |
STUDY ON THE INTERACTION BETWEEN PHOTOGRAPHIC GELATINS AND CHEMICAL SENSITIZERS BY XPS |
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| ZHANG Yiheng,TAN Ji,YAN Tiantang,YU Shuqin,ZHUANG Siyong,PENG Bixian. STUDY ON THE INTERACTION BETWEEN PHOTOGRAPHIC GELATINS AND CHEMICAL SENSITIZERS BY XPS[J]. Imaging Science and Photochemistry, 1999, 17(2): 120-127. DOI: 10.7517/j.issn.1674-0475.1999.02.120 |
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| Authors: | ZHANG Yiheng TAN Ji YAN Tiantang YU Shuqin ZHUANG Siyong PENG Bixian |
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| Affiliation: | 1. Department of Applied Chemistry, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, P, R.China;2. Institute of Fine Chemical Industry, East China University of Science and Technology, Shanghai 200237, P, R.China;3. Institute of Photographic Chemistry, The Chinese Academy of Sciences, Beijing 100101, P, R.China |
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| Abstract: | The mechanism of interaction between two kinds of photographic gelatins and chemical sensitizers was studied by X-ray Photoelectron Spectroscopy. After the gelatin samples had been immersed into the chloroauric acid solution for 5 minutes, methionine and methionine sulfoxide in gelatins were oxidized to methionine sulfone, reducing most part of Au3+ to Au+ which was coordinated by gelatin macromolecule. According to the ratio of Au3+ to Au+ in gelatins, the reducing capacity of Roussalot gelatin is slightly higher than that of Baotou gelatin. Addition of sodium thiosulfate to gelatins, methionine sulfoxide was reduced to methionine. Thiosulfate, which is stronger reducer than methionine and methionine sulfoxide, could coexist steadily with methionine and methionine sulfone in gelatins. Two kinds of photographic gelatins added with Na2S2O3 can reduce Au3+ to colloid gold. In this oxide-reduction reaction, the main reducer is thiosulfate but not methionine of gelatins. The reducing capacity of photographic gelatins to chloroauric acid increased when the thiosulfate was added. |
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| Keywords: | photographic gelatin chemical sensitizer Xray photoelectron spectroscopy |
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