This study examined the supersensitization of 4-hydroxy-6-methyl-1,3,3a,7-tetrazaindene (TAI) in silver chloride emulsions. A systematic investigation on the concentration of TAI and the order of adding TAI and dyes had been carried out. It was discovered that the supersensitization efficiency of TAI varied greatly with the order of adding TAI and the concentration of TAI. The spectrometry study suggested that TAI could intensify the formation of the J-aggregate of dye and had quite different effects on the absorption spectra and spectral distribution of emulsion sensitivity when added in different orders.
Weiping Peng, Ping Chen, Peicheng Duan, Shuyun Zhou, Deshui Zheng, "The Order of Addition of 4-hydroxy-6-methyl-1,3,3a,7-tetrazaindene and Dyes into Silver Chloride Emulsion" in Journal of Imaging Science and Technology, 2000, pp 223 - 228, https://doi.org/10.2352/J.ImagingSci.Technol.2000.44.3.art00007