Patent ID: 7449602

Claim:
A stilbene derivative represented by the general formula (1): (wherein A is a divalent organic group having an aromatic hydrocarbon as a basic skeleton and is represented by the following formula (2)); plural R 1 to R 7 are independent substituents, respectively, each of which is a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted halogenated alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, or a substituted or unsubstituted amino group, or two of the plural R 1 to R 7 may be bound or condensed to form a carbon ring structure; plural Ar 1 and Ar 2 are independent from each other, each of which is a substituted or unsubstituted aryl group having 6 to 30 carbon atoms; a and b are numbers of repetition, each of which is an integer from 0 to 4; and c is an integer from 1 to 3, but at least one of the plural R 1 and R 5 is a substituent other than a hydrogen atom);