Silver halide photographic materials

Details Silver halide photographic materials Silver halide photographic materials

1991-06-28

1993-02-02

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430584, 430587, 430588, 430596, G03C 114

Patent

active

051837331

ABSTRACT:
Disclosed are silver halide photographic materials, comprising a support having thereon a layer which contains a compound represented by the following general formula (I): ##STR1## wherein A.sub.1 and A.sub.2 each represents groups of atoms which are required to complete aromatic rings, which may be substituted or unsubstituted; R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each independently represents a hydrogen atom, an alkyl group, an alkenyl group, a phenyl group, a five- or six-membered heterocyclic group, an acyl group or an alkoxy group, which may be substituted or unsubstituted; R.sub.5 and R.sub.6 each independently represents an alkyl group, a phenyl group or a five- or six-membered heterocyclic group, which may be substituted or unsubstituted; X represents a p-valent anion; p represents 1, 2 or 3; L represents a methine group which may be substituted or unsubstituted, or a trivalent linking group wherein three, five or seven methine groups are linked by conjugated double bonds; and X may be bonded to A.sub.1, A.sub.2, R.sub.1 to R.sub.6 or L to form an intramolecular salt. These materials are spectrally sensitized action for light having a long wavelength, but the dyes of general formula (I) have comparatively short methine chains.

REFERENCES:
patent: 3243298 (1966-03-01), Libeer et al.
patent: 3706570 (1972-12-01), Nakazawa et al.
Babichev, F. S.; Babicheva, A. F. Isoelectronic Analogs of Indoline. V. Derivatives of Pyrrolo [1,2-a] benzimidazole, Khim. Geterotsikl. Soedin. 1967, (5), 917-922, English translation.
Chemical Abstracts 69(16):60031v.

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