AN ESR STUDY OF INTERNALLY SENSITIVE EMULSIONS

doi:10.7517/j.issn.1674-0475.1998.03.203

Imaging Science and Photochemistry ›› 1998, Vol. 16 ›› Issue (3): 203-209.DOI: 10.7517/j.issn.1674-0475.1998.03.203

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AN ESR STUDY OF INTERNALLY SENSITIVE EMULSIONS

WANG Binhui¹, XIA Yunyong², ZHANG Yiheng³, ZHUANG Siyong ¹

1. Research Institute of Fine Chemicals, East China University of Science and Technology, Shanghai 200237, P. R. China;
2. The Second Photographic Film Factory, Nanyang 473000, P. R. China;
3. Department of Applied Chemistry, University of Science and Technology, Hefei 230026, P. R. China

Received:1997-09-17 Revised:1998-01-19 Online:1998-08-20 Published:1998-08-20

Abstract

Abstract: The preparation and electron spin resonance of two types of internally sensitive core-shell emulsions: with chemical structure imperfections and with physical lattice imperfections were studied in this paper. It was found that both the internal sensitivity and the intensity of ESR signal increased with increase of the chemical sensitization time to a maximum and then decreased. The ESR signal intensity decreased with decrease of the core/shell ratio, and with increase of the fogging level. Different desensitizing dyes had different effects on the internal photographic property and ESR signal intensity because of their desensitizing mechanisms. The results can be explained based on the behavior of the positive hole within the silver halide crystal.

Key words: electron spin resonance spectrum, internally sensitive emulsion, chemical sensitization, desensitizing dye, fogging effect

WANG Binhui, XIA Yunyong, ZHANG Yiheng, ZHUANG Siyong . AN ESR STUDY OF INTERNALLY SENSITIVE EMULSIONS[J]. Imaging Science and Photochemistry, 1998, 16(3): 203-209.

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AN ESR STUDY OF INTERNALLY SENSITIVE EMULSIONS

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