Patent ID: 8354668

Claim:
A compound represented by a formula: wherein R 2 and R 3 are independently F, Cl, or C 1-12 perflouroalkyl; R 4 and R 5 are independently H, F, Cl, or C 1-10 alkyl; each Ar is independently 1,4-interarylene having 0, 1, or 2 substituents independently selected from C 1-3 alkyl, F, and Cl; n is 1, 2, or 3, R 6 is an optionally substituted diarylamino, optionally substituted diarylaminophenoxy, or R 7 —O-Ph-O—; Ph is optionally substituted p-interphenylene; and R 7 is C 1-10 alkyl or C 1-9 O 1-4 ether.