Silver halide photographic light-sensitive material
申请人:Fuji Photo Film Co., Ltd.
公开号:US04814265A1
公开(公告)日:1989-03-21
A silver halide photographic light-sensitive material containing at least one methine dye which consists of an azulene nucleus, at least one of 10 carbon atoms of which is replaced by chalcogen atom(s) or nitrogen atom(s), and further whose 7-membered ring part is substituted with a methine bond having at the terminal an auxochrome which forms a conjugated resonance chromophore together with 10.pi. electron system of the nucleus is provided. Silver halide photographic light-sensitive materials of the invention are spectrally sensitized in long wavelength region, and have improved photographic performances such as sharpness and color resolution.
Methine dye which contains a cycloheptimidazole nucleus having a substituent at its 1-position thereof and in which the 7-membered ring moiety is substituted by a methine bond having an auxochrome, at the terminal thereof, for forming a conjugated resonance chromophoric group with the 10 .pi. electron series of the nucleus, showing a long absorption with one or a few methine bonds and have high light-stability and solution-stability.