Naphthothiazolo carbocyanine is of industrial importance as red-sensitizing dye in the spectral sensitization. Sensitizing dye was prepared by the reaction of 2-methyl-3- sulfopropyl-4,5-naphthothiazolium (inner salt) with triethyl orthopropionate in the presence of triethylamine. The product was identified by using various analytical tools such as elemental analyzer, IR spectrophotometer, UV-Vis spectrophotometer, 1H-NMR spectrometer, TGA and DSC. The maximum absorption peak in methanol solvent was 578nm. Therefore, it was concluded that naphthothiazolo carbocyanine dye can be used as sensitizing dye for the spectral sensitization of photographic emulsion and color cosmetics.

In this study, benzoxazolo carbocyanine is of industrial importance as green-sensitizing dye in the spectral sensitization. Sensitizing dye was prepared by the reaction of 2-methyl-3-sulfopropyl-4,5-benzoxazolium (inner salt) with triethyl orthobenzoate in the presence of triethylamine. The product was identified by using various analytical tools such as elemental analyzer, IR spectrophotometer, UV-Vis spectrophotometer, 1H-NMR spectrometer, TGA and DSC. The maximum absorption peak in methanol solvent was 507 nm. Therefore, it was concluded that benzoxazolo carbocyanine dye can be used as sensitizing dye for the spectral sensitization of photographic emulsion and color cosmetics.

In this paper, it was studied about the red-sensitive layer. UV-Vis data of the dye at monomeric and J-state were considered with respect to their performance(contrast, speed, density and fog) in photographic emulsion. The sensitizing effect of the dye is found to be strongly structure-dependent. Naphthctbiazolo carbocyanine dye can be used as red sensitizing dye for the spectral sensitization of photographic emulsion.

Naphthothiazolo carbocyanine is of industrial importance as red-sensitizing dye in the spectral sensitization of emulsion microcrystals in negative film-making. In this study, red-sensitizing dye was prepared by the reaction of 2-methyl-3-sulfopropyl-4,5-naphthothiazolium(inner salt) with triethyl orthoacetate in the presence of triethylamine. The product was identified by using various analytical tools such as Elemental analyzer, IR spectrophotometer, UV-Vis spectrophotometer, Mass spectrometer, 1H-NMR spectrometer, TGA and DSC. The maximum absorption peak in methanol solvent was 573nm. Therefore, it was concluded that naphthothiazolo carbocyanine dye can be used as red0sensitizing dye for the spectral sensitization of photographic emulsion.

In this study, benzoxazolo carbocyanine dye was used as sensitizer for photographic emulsion, and the photographic characteristics were examined. The basic properties of sensitizer such as stability in various solvents were examined. The sensitizer was very stable in methanol, acetonitrile, acetone, dimethylformamide, and chloroform solution. Absorption spectra of benzoxazolo carbocyanine dye 2.5×10-6M and 5×10-6M concentrations in 10% aqueous methanol solutions containing 10-2M potassium chloride show the monomer-J-aggregation characteristics. Compared to the absorption peak of the monomer in pure methanol solution, the red shifts of the monomer-J-aggregate peaks of benzoxazolo carbocyanine dye of 2.5×10-6M and 5×10-6M concentrations in 10% aqueous methanol solutions containing 10-2M potassium chloride are 34nm respectively, and the sensitizing peak of benzoxazolo carbocyanine dye in photographic emulsion has red shift of 34nm. Therefore, if was concluded that benzoxazolo carbocyanine dye can be used as green sensitizing dye for the spectral sensitization of photographic emulsion.