Imaging Science and Photochemistry ›› 2003, Vol. 21 ›› Issue (2): 89-94.DOI: 10.7517/j.issn.1674-0475.2003.02.89

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FORMATION OF PHOTOGENERATED RADICALS OF SOME CARBOXYLATES IN AQUEOUS SOLUTION WITH DISPERSED AgBr

GUO Hong, YAO Lin-hui, SHI Yao, CHEN Jing-rong, XIA Pei-jie   

  1. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100101, P. R. China
  • Received:2002-07-14 Revised:2002-10-31 Online:2003-03-23 Published:2003-03-23

Abstract: Free radicals generated during different illumination conditions of HCOONa,K2C2O4, and CH3COONa solutions with or without AgBr grains dispersed were investigated by ESR spin trapping.The ESR spectra of different radicals were detected.The results indicated that some carboxylates,especially formate,were of a sensitive photodecomposition and could be enhanced by AgBr grains under illumination.These results were believed to be quite helpful,particularly to study on the mechanism of sensitization for some doped emulsions with carboxylates,such as formate etc.

Key words: photogenerated radical of carboxylates, ESR spin trapping, hole scavenger

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