Patent ID: 6361920
Filing Date: 2002-03-26
Classification: C07D,C07F,G03C

Abstract:
A photographic material comprising a 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 alkylene group, an alkylene group having a heteroatom in its chain, an arylene group, a heteroarylene group, and â€”COâ€”N(R)â€”L3â€”, wherein R represents hydrogen, an alkyl group, an aryl group, or heteroaryl group, and L3 represents an alkylene group, an arylene group, or an heteroarylene group, 4) Q2 is a cationic group, 5) Z represents the necessary atoms to form an aromatic or heteroaromatic ring, 6) each of A1 and A2 independently represents a hydrogen, a group capable of yielding a hydrogen under alkaline photographic processing conditions or a SO2R group, provided that, if A1 is SO2R, A2 is a hydrogen and vice versa. R represents an alkyl or aryl group, 7) Yâˆ’ is a negatively charged counterion to compensate the positive charge of the cationic functional groups.