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Citation: Zhang Yi-Heng, Zhang Guang-Xiang, Yan Tian-Tang, Yu Shu-Qin, Zhuang Si-Yong. Electroless Copper Deposition Catalyzed by ld in Photographic Gelation Layer[J]. Acta Physico-Chimica Sinica, ;1998, 14(11): 975-980. doi: 10.3866/PKU.WHXB19981104 shu

Electroless Copper Deposition Catalyzed by ld in Photographic Gelation Layer

1.
Department of Applied Chemistry,Deparmtne of Chemical Physics,University of Science and Technology of China,Hefei 230026

Received Date: 12 January 1998
Available Online: 15 November 1998

The changes of chemical states of sulfur element in photographic gelatin before and after electroless depositions are studied using in situ Ar+ beam sputtering and ESCA scanning techniques of X-ray Photoelectron Spectroscopy in this paper. The depth distributions of copper and ld within electrically conductive layer produced by electroless copper deposition are carried out, and the mechanism of electroless copper deposition catalyzed by ld in photographic gelatin is investigated. The results indicate that under acidic condition(pH=3.20), methionine sulfone in gelatin macromolecule still having relatively high reducing power and methionine of gelatin macromolecule, which are both oxidized to methionine sulfoxide, reduce Au3+ finally to colloidal ld which is the catalytic center of electroless copper deposition at the initial stage of reduction. Afterwards the reduction deposition of Cu2+ continues because of the autocatalysis of new-formed copper. Under basic condition (pH=12.50) in the process of electroless deposition, methionine sulfoxide in gelatin is partly reduced to methionine by reductive agent HCHO.
- Photographic gelatin,
- Reducing power,
- Electroless copper deposition,
- Depthprofiling,
- Chemical state
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Electroless Copper Deposition Catalyzed by ld in Photographic Gelation Layer

南开大学师唯/华北电力大学（保定）刘景维：二维配位聚合物中有序的亲锂冠醚位点用于无枝晶锂沉积

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通讯作者: 陈斌, bchen63@163.com