Patent ID: 6355394
Filing Date: 2002-03-12
Classification: C07D,G03C

Abstract:
A photographic material comprising support, at least one emulsion layer, and optionally one or more other hydrophilic layers, characterized in that said emulsion layer or another hydrophilic layer adjacent to said emulsion layer contains a compound according to following general formula I: wherein:1) L1 is a divalent linking group consisting of a linear chain having at most two atoms in said linear chain, 2) Q1 is a cationic nitrogen containing aromatic heterocyclic ring, 3) L2 is a divalent linking group, selected from the group consisting of an group, an alkylene group having a heteroatom in its chain, an arylene group, and a heteroarylene group, 4) M is a hydrogen or a group capable of generating a hydrogen under alkaline photographic processing conditions, 5) R1 is a hydrogen, an alkyl group, an aryl- or heteroaryl group, 6) Z represents the necessary atoms to form an aromatic or heteroaromatic ring, 7) each of A1 and A2 independently represents a hydrogen, a group capable of yielding a hydrogen under alkaline photographic processing conditions or a SO2R2 group, provided that, if A1 is SO2R, A2 is a hydrogen and vice versa, R2 represents an alkyl or aryl group, 8) Yâˆ’ is a negatively charged counterion to compensate the positive charge of the cationic functional groups.