Patent ID: 6538161
Filing Date: 2003-03-25
Classification: C09K

Abstract:
A fluorescent compound of formula (1):Aâ€”Arâ€”Bâ€ƒâ€ƒ(1), whereinAr is an aromatic group of formula (2a) or (2b), A is an electron donating group, and B is an electron attractive ethenyl group of formula (3a) or (3b) â€ƒwherein Z1 is a cyano group or an ester group, Z2 is a hydrogen atom, cyano group, a halogen atom, a halogenated alkyl group, carboxyl group or an alkylcarbonyl group, and Z3 is a substituent selected from the group consisting of a halogen atom, a halogenated alkyl group, a carboxyl group, an alkylcarbonyl group and a group of formula (4), (5), (6) or (7): â€ƒwherein Y1 is a cyano group, an ester group, a halogen atom, wherein the halogen atom is a fluorine or a bromine, or a halogenated alkyl group, wherein the halogenated alkyl group is a trifluoromethyl group, n is 1-5 and represents the number of Y1 groups wherein the hydrogen atoms of the phenyl group are substituted, Y2 and Y3 each represent a cyano group, an ester group, a halogen atom, wherein the halogen atom is fluorine or bromine, or a halogenated alkyl group, wherein the halogenated alkyl group is a trifluoromethyl group, m is 1-3 and represents the number of Y2 groups wherein the hydrogen atoms of the ring moiety of the naphthyl group bonded with the ethenyl group are substituted, h is 1-4 and represents the number of Y3 groups wherein the hydrogen atoms of another ring moiety of the naphthyl group are substituted, Y4, Y5 and Y6 each represent a cyano group, an ester group, a halogen, wherein the halogen atom is a fluorine or a bromine, or a halogenated alkyl group, wherein the halogenated alkyl group is a trifluoromethyl group, t is 1-3 and represents the number of Y4 groups wherein the hydrogen atoms of the ring of the anthryl group is substituted with a hydrogen atom of formula (3a) or (3b), s is 1-2 and represents the number of Y5 groups wherein the hydrogen atoms of the middle ring of the anthryl group are substituted, and u is 1 or 2 and represents the number of Y6 groups wherein the hydrogen atoms of the last ring of the anthryl group are substituted.