Patent ID: 7598359

Claim:
A bis(indolestyryl) compound of the formula (I): wherein A and B are the same or different and are benzene, pyridone, or heterocyclic ring containing O, S, or N, R 1 and R 1 ′ are H, halogen, C 1-5 alkyl, nitro, ester, carboxyl, sulfo, sulfonamide, amide, sulfo ester, C 1-3 alkoxy, amino, C 1-5 alkylamino, 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 are 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, R 4 is H, C 1-5 alkyl, hydroxyl, halogen, or C 1-5 alkoxy, R 5 and R 5 ′ are the same or different and are H, halogen, C 1-5 alkyl, nitro, C 1-3 alkoxy, amino, cyano, C 1-6 alkylsulfonyl, or C 2-7 alkoxy carbonyl, W is oxygen, sulfur, selenium, —NR, or —C(CH 3 ) 2 , n is 1˜18, and Z 1 and Z 2 are different and are an anion or an anionic organometallic complex with −1 or −2 valence, wherein R 2 and R 3 or R 2 ′ and R 3 ′ are joined together or with a benzene to form a ring, and R bonded to nitrogen is C 1-4 alkyl.