Patent ID: 7348072

Claim:
A light-emitting polymer represented by the formula I: wherein X and U are independently selected from the group consisting of a single bond, —O—, —S—, —CO—, —Si(R′)(R″)—, —N(R′)— and —C(R′)(R″)—, and at least one of X and U is not a single bond; A, B, C and D are independently selected from the group consisting of a hydrogen atom, a substituted or unsubstituted C1-C30 alkylene group, a substituted or unsubstituted C2-C30 alkenylene group, a substituted or unsubstituted C3-C20 cyclic alkylene group, a substituted or unsubstituted C6-C30 arylene group, and a substituted or unsubstituted C2-C30 heteroarylene group; R 1 , R 2 and R 3 are independently selected from the group consisting of a hydrogen atom, a substituted or unsubstituted C1-C30 alkyl group, a substituted or unsubstituted C1-C30 alkoxy group, a substituted or unsubstituted C3-C20 cyclic alkyl group, a substituted or unsubstituted C6-C30 aryl group, a substituted or unsubstituted C6-C30 arylalkyl group, a substituted or unsubstituted C2-C30 heteroaryl group, a hydroxy group, a cyano group, and —N(R′)(R″) in which R′ and R″ are independently selected from the group consisting of a hydrogen atom, a substituted or unsubstituted C1-C30 alkyl group, a substituted or unsubstituted C6-C30 aryl group, a substituted or unsubstituted C2-C30 heteroaryl group, and a substituted or unsubstituted C3-C20 cyclic alkyl group; and m is a degree of polymerization and is a real number from 5 to 1,000.