Silver halide photographic material

Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing

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430573, 430576, G03C 120, G03C 128

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active

054895057

ABSTRACT:
A silver halide photographic material which contains methine dyes represented by formula (I) to obtain high sensitivity and excellent storage stability: ##STR1## wherein Z.sub.1 and Z.sub.2 each represents atoms necessary to complete a 5- or 6-membered nitrogen-containing hetero ring; Q represents atoms necessary to complete a 5- or 6-membered ring; R.sub.1 represents an alkyl group, an aryl group or a heterocyclyl group; R.sub.2 and R.sub.3 each represents an alkyl group; L.sub.1, L.sub.2, L.sub.3, L.sub.4, L.sub.5 and L.sub.6 each represents a methine group; n.sub.1 and n.sub.2 each represents 0 or 1; M represents an ion for neutralizing electric charges; and m is a number necessary for neutralization of electric charges in the dye molecule, including 0.

REFERENCES:
patent: 5126235 (1992-06-01), Hioki
patent: 5154995 (1992-10-01), Kawai
patent: 5290675 (1994-03-01), Hioki et al.
patent: 5338657 (1994-08-01), Kato
Slominskii et al., Zh. Org. Khim., 15(4), 865-8, 1979, English Translation pp. 774-777.
Slominskii et al., Ukr. Khim. Zh., 40(10), 1166-73, 1974, English Translation.
Slominskii et al., Zh. Nowehn. Prikl, Fotogr. Kinematogr., 35(6), 457-62, 1990.
Chemical Abstract 115:94405d with Registry Listing of Compound 135692-32-9.
Lenhard et al., "Electrochemical and Spectroscopic Analyses of the Thermodynamics of the Reversible Dimerization of Cyanine Radical Dications", Journal of the American Chemical Society, V. 109, No. 19, pp. 5805-5813.

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