Patent ID: 7309532

Claim:
A cyclopentaphenanthrene-based compound represented by Formula 1, wherein X is C, N, O, or S, where when X is C, a and b are both 1, when X is N, one of a and b is 0, and when X is O or S, a and b are both 0; wherein R 1 and R 2 are each selected from the group consisting of hydrogen, a substituted or unsubstituted C 1 -C 30 alkyl, a substituted or unsubstituted C 3 -C 30 cycloalkyl, a substituted or unsubstituted C 1 -C 30 alkoxy, a substituted or unsubstituted C 6 -C 30 aryl, a substituted or unsubstituted C 6 -C 30 aryloxy, a substituted or unsubstituted C 6 -C 30 arylalkyl, a substituted or unsubstituted C 2 -C 30 heteroaryl, a substituted or unsubstituted C 6 -C 30 heteroaryloxy, and a substituted or unsubstituted C 2 -C 30 heteroaryloxy group, or wherein R 1 and R 2 are interconnected to form a saturated or unsaturated C 3 -C 30 ring; R 3 , R 3 ′, R 4 , R 4 ′, R 5 and R 5 ′ are each independently selected from the group consisting of a hydrogen, a hydroxy, a substituted or unsubstituted amino, a cyano, a halogen atom, a substituted or unsubstituted C 1 -C 30 alkyl, a substituted or unsubstituted C 3 -C 30 cycloalkyl, a substituted or unsubstituted C 1 -C 30 alkoxy, a substituted or unsubstituted C 6 -C 30 aryl, a substituted or unsubstituted C 6 -C 30 arylalkyl, and a substituted or unsubstituted C 2 -C 30 heteroaryl group; wherein R 1 and R 2 are not both hydrogen; and wherein m is an integer in the range of 2 to about 5,000.