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The effect of concentration of four dyes has been investigated, which are of similar mo-lecular structures, same spectroscopic absorption spectra, and very close values in redox po-tential upon the spectral sensitization of photographic emulsion. The results have shownthat dyes which are liable to form J-aggregate diminish the effect of dye-induced desensiti-zation, while dyes which are not easy to form J-aggregate exhibit a very strong effect ofdye-induced desensitization. According to phosphorescence and electrochemistry experimentalresults, we could assume that the aggregate state acts in a way to regenerate the oxidizeddye, thus being favorable to the spectral sensitization. In this paper, the factor of inhibi-tion of development by dye adsorption has also been proposed to be a factor which cannotbe neglected in dye-induced desensitization.
The effect of concentration of four dyes has been investigated, which are of similar similar mo-lecular structures, the same spectroscopic absorption spectra, and very close values in redox po-tential upon the spectral sensitization of photographic emulsions. The results have shownthat dyes which are photo emulsion. to form J-aggregate diminish the effect of dye-induced desensiti-zation, while dyes which are not easy to form J-aggregate exhibit a very strong effect of dye-induced desensitization. According to phosphorescence and electrochemistry experimental results, we could assume that the aggregate state this in a way to regenerate the oxidizeddye, thus being favorable to the spectral sensitization. In this paper, the factor of inhibi-tion of development by dye adsorption has also been set to be a factor which cannotbe neglected in dye-induced desensitization.