Patent ID: 7390549

Claim:
An asymmetric bis(indolestyryl) compound having formula (I): wherein A and B are the same or different and comprise benzene, naphthalene, or heterocyclic ring containing O, S, or N, R 1 and R 1 ′ are H, halogen atoms, C 1-5 alkyl, nitro, ester, carboxyl, sulfo, C 1-3 alkoxy, amine, alkylamine, cyano, C 1-6 alkylsulfonyl, or C 2-7 alkoxy carbonyl, R 2 , R 2 ′, R 3 , and R 3 ′ are the same or different and comprise H, substituted or non-substituted C 1-6 straight chain or branched alkyl, substituted or non-substituted C 6-18 aryl, C 2-6 straight chain or branched alkenyl, C 3-6 cycloalkenyl, or substituted or non-substituted C 3-6 cycloalkyl, or C 3-6 cycloalkyl containing hetero atom, R 4 is H, hydroxyl, halogen atoms, or alkoxy, R 5 and R 5 ′ are the same or different and comprise H, halogen atoms, C 1-5 alkyl, nitro, C 1-3 alkoxy, amine, cyano, C 1-6 alkylsulfonyl, or C 2-7 alkoxy carbonyl, n is 1˜18, Y is C(R 6 R 7 ), C 1-3 alkylamino or hetero atom, R 6 and R 7 are C 1-3 alkyl, and Z − is an anion or an anionic organometallic complex, wherein when A=B, R 1 is not equal to R 1 ′ and when A≠B, R 1 is equal to R 1 ′ or not, and R 2 and R 3 or R 2 ′ and R 3 ′ are joined together or with a benzene to form a ring.