Silver halide photographic materials

Details Silver halide photographic materials Silver halide photographic materials

1991-12-06

1994-02-01

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430604, 430605, 430615, 430264, G03C 109

Patent

active

052831698

ABSTRACT:
A silver halide photographic material is disclosed, comprising a support having thereon at least one silver halide emulsion layer and the other hydrophilic colloid layer, wherein the emulsion layer comprises a silver halide emulsion containing a compound having a nitrosyl ligand or a thionitrosyl ligand per mol of silver and a transition metal selected from the group consisting of the elements belonging to Groups V to X of the periodic table in an amount of 1.times.10.sup.-6 mol or more per mol of silver, and at least one of the silver halide emulsion layer and the other hydrophilic colloid layer contains at least one compound represented by formula (I), (II), (III), (IV) or (V). ##STR1## wherein each of R.sup.1, R.sup.2, R.sup.3 and R.sup.4, which may be the same or different, represents a hydrogen atom, an alkyl group, an aryl group, an amino group, a hydroxyl group, an alkoxy group, an alkylthio group, a carbamoyl group, a halogen atom, a cyano group, a carboxyl group, an alkoxycarbonyl group or a heterocyclic group, and R.sup.1 and R.sup.2 or R.sup.2 and R.sup.3 may combine together to form a five-membered or six-membered ring, provided that at least one of R.sup.1 and R.sup.3 represents a hydroxyl group and the total number of carbon atoms of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 is at least 2; Z represents an alkyl group having 1 to 18 carbon atoms, an aryl group having 6 to 18 carbon atoms or a heterocyclic group; Y represents the atoms necessary to form an aromatic ring having 6 to 18 carbon atoms or a heterocyclic ring; M represents a metal atom or an organic cation; and n is an integer of 2 to 10.

REFERENCES:
patent: 4933272 (1990-06-01), McDugle et al.
patent: 4960689 (1990-10-01), Nishikawa et al.
patent: 5114838 (1992-05-01), Yamada
patent: 5229263 (1993-07-01), Yoshida et al.

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