Silver halide photographic material

Details Silver halide photographic material Silver halide photographic material

1994-10-25

1995-08-29

Chea, Thorl

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430513, 430522, 430583, 430584, 430585, 430586, 430587, 430944, G03C 112

Patent

active

054459303

ABSTRACT:
A novel silver halide photographic material is provided, comprising a hydrophilic colloidal layer containing at least one dye represented by the following formula (I): ##STR1## wherein Y.sup.1 and Y.sup.2 each represents a chalcogen atom, --CH.dbd.CH--, --N(R.sup.10)--, or --C (R.sup.10)(R.sup.11)--, in which R.sup.10 and R.sup.11 each represents an alkyl group; Z.sup.1 and Z.sup.2 each represents a nonmetallic atom group necessary for forming a benzo condensed or naphtho condensed ring; R.sup.1 and R.sup.2 each represents an alkyl group; the plurality of L groups may be the same or different and each represents a methine group, with the proviso that at least one of the plurality of L groups represents a methine group substituted by --OR.sup.12, --N(R.sup.12)(R.sup.13), --SR.sup.12 or --CH(R.sup.14)(R.sup.15), in which R.sup.12 represents an alkyl or aryl group substituted by an acidic substituent, R.sup.13 represents a hydrogen atom or an alkyl or aryl group substituted by an acidic substituent, and R.sup.14 and R.sup.15 each represents a cyano group, a carboxylic acid group, an acyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, a carbamoyl group, a sulfonyl group or a sulfamoyl group, with the proviso that at least one of R.sup.14 and R.sup.15 contains an acidic substituent; X represents an anion; p represents an integer 0 or 1; r represents an integer 0 or 1; m represents an integer 2 or 3; and n represents an integer 1 or 2, with the proviso that when the dye forms an intramolecular salt, n is 1; and wherein the dye contains at least three acidic substituents.

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Synthetic Communications, Strekowski et al., Facile Derivatizations of Heptamethine Cyanine Dyes, 1992, 2593-2598.
J. Org. Chem., Strekowski et al., Substitution Reactions of a Nucleofugal Group in Heptamethine Cyanine Dyes. Synthesis of an Isothiocyanate Derivative for Labeling of Proteins with a Near-Infrared Chromophore, 1992, 4578-4580.

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