Patent ID: 6482494
Filing Date: 2002-11-19
Classification: C09B,Y10T

Abstract:
A hemicyanine dye having formula (1): wherein Z is a benzene ring, naphthalene ring or anthracene ring; X1 is S, O, Se, NR or C(CH3)2; X2 is S, NR of O, where R is hydrogen or an alkyl group of 1 to 5 carbon atoms; R1 is hydrogen, halogen atoms, an alkyl group of 1 to 3 carbon atoms or a nitro group; each of R2 and R5 is an alkyl group of 1 to 5 carbon atoms; each of R3 and R4 is hydrogen, an hydroxy group, an alkyl group of 1 to 4 carbon atoms, halogen atoms or a halide; Y is Cl, Br, I, ClO4, BF4, BrO4, PF6, CH3SO3, CF3SO3, 4-CH3C6H4SO3, C6H5SO3, 6-SO3C10H6SO3 or HSO4; n is an integer of 0-2; and m is an integer of 1-2.