新型2－硫代苯并咪唑磺酰亚胺盐类在卤化银乳剂中的超增感

Supersensitization of New 2-Thiobenzimidazolylsulfonylimidate Compounds in Silver Halide Emulsion

通过电子自旋共振（ＥＳＲ）技术、染料的极谱分析以及在乳剂中的应用试验，对文题化合物与中位乙基取代的噻碳菁染料进行超增感组合研究。结果表明：超增感作用与ＥＳＲ信号、极谱半波电位之间有一定关系，当超增感剂的氧化电位值低于增感染料，且小于＋０．８８Ｖ时，光谱增感效果提高，ＥＳＲ信号强度亦增强。其超增感作用的产生可用正穴捕获超增感机理加以阐明。

The optical sensitization of 2- thiobenzimidazolylsulfonylimidate and meso-posi-tion ethyl substituted thiocarbocyanine dyes was studied. Electron Spin Resenance(ESR)and polarographic measurement of dyes and photographic emulsion tests show that efficiency of the supersensitizing combination is connected with ESR signal and polalographic half- wave poten-tial.When the oxidation potential of supersensitizer is below 0.88V,and lower than the oxidation potential of the sensitizer,the photographic sensitivity of this system is raised and so does the intensity of ESR signals. The function of supersensitization can be explained by the hole trapping mechanism.