Patent ID: 7307173

Claim:
A compound having the formula D-π a -B-π b -A where D is selected from a group consisting of N,N-disubstituted amino phenyl and N,N-disubstituted amino thiophenyl group, B is selected from the group consisting of substituted or unsubstituted thiophene group, substituted or unsubstituted fused dithiophene, and substituted or unsubstituted thiazole, π a is optional and represents a group that conjugates D to B, π b is a group that conjugates B to A and wherein A has the formula wherein X is cyano; wherein Y is C(X a )(X b ), where X a and X b are CN; and wherein R 1 is substituted or unsubstituted alkyl; substituted or unsubstituted aryl; or —C(═O)R 2 , where R 2 is substituted or unsubstituted alkyl, or substituted or unsubstituted aryl.