Patent ID: 7629379

Claim:
A compound of General Formula 1: wherein: R is hydrogen or a linear or branched C 1-40 alkyl; X is O, S, or NR 1 where R 1 is a linear or branched C 1-40 alkyl, C 2-40 alkenyl or C 2-40 alkynyl group, an aryl, a heteroaryl or C 1-40 alkylaryl or alkylheteroaryl group; one or both of C and D is OR 2 , SR 2 , NR 3 R 4 where R 2 , R 3 , and R 4 are each independently hydrogen, a linear or branched C 1-40 alkyl, C 2-40 alkenyl or C 2-40 alkynyl group, an aryl or C 1-40 alkylaryl group or a linear or branched C 1-40 alkyl NR 5 R 6 chain where R 5 and R 6 are each independently hydrogen, a linear or branched C 1-40 alkyl or an optionally complex metal ion M n+ /n wherein n is an integer from 1 to 8; m is 1; A is chosen from acridine, coumarin, carbazole, quinolone, indolyl, bipyridyl, thiazole, and benz-2-oxa-1,3-diazole, wherein A may be substituted with one or more substituents chosen from nitro, chloro, fluoro, bromo, nitrile, sulfonic acid or salt of sulfonic acid, carboxy, carboxyalkyl, carboxyalkoxy, carboxylalkylamino, carboxyalkylthio, C 1-6 -alkoxy, di C 1-40 alkyl phosphonate, C 1-40 alkyl phosphonate, phosphonic acid, amino, amino C 1-40 alkyl, and amino di (C 1-40 -alkyl); and B is hydrogen, a linear or branched C 1-40 alkyl, C 2-40 alkenyl or C 2-40 alkynyl group, an aryl, a heteroaryl or C 1-40 alkylaryl or alkylheteroaryl group.