Patent ID: 8003229

Claim:
A compound represented by Formula 1: wherein R 1 , R 2 , R 3 , R 6 , R 7 , and R 8 are independently selected from the group consisting of H, optionally substituted C 1-12 alkyl, optionally substituted phenyl, optionally substituted carbazolyl, optionally substituted diphenylamine, optionally substituted carbazolylphenyl, and optionally substituted diphenylaminophenyl; provided that: at least one of R 1 , R 2 , and R 3 is selected from optionally substituted carbazolyl, optionally substituted diphenylamine, optionally substituted carbazolylphenyl, and optionally substituted diphenylaminophenyl, and at least one of R 6 , R 7 , and R 8 is selected from optionally substituted carbazolyl, optionally substituted diphenylamine, optionally substituted carbazolylphenyl, and optionally substituted diphenylaminophenyl; and R 4 and R 5 are independently selected from the group consisting of H, optionally substituted C 1-12 alkyl, optionally substituted phenyl, optionally substituted diphenylamine and optionally substituted diphenylaminophenyl.