Patent ID: 8771845

Claim:
A compound represented by a formula: wherein R 1 is a C 1-10 O 1-4 ether attaching at an oxygen atom or —R 7 —NR 8 R 9 ; wherein R 7 is a single bond or optionally substituted C 6-10 aryloxy; and R 8 and R 9 are independently optionally substituted C 6-10 aryl, wherein R 8 and R 9 optionally link together form a third ring comprising N; Ar 1 is aryl having 0, 1, 2, 3, or 4 substituents independently selected from C 1-3 alkyl and F; Ar 2 is p-interphenylene having 0, 1, 2, 3, or 4 substituents independently selected from C 1-3 alkyl and F; X is O; Ar 3 is p-interphenylene having 0, 1, 2, 3, or 4 substituents independently selected from C 1-3 alkyl and F; or Ar 3 is a single bond; Z is NR 6 , wherein R 6 is optionally substituted phenyl, optionally substituted —CH 2 -phenyl, or optionally substituted (4-halophenyl)methyl; and R 2 , R 3 , R 4 , and R 5 are independently H, optionally substituted C 6-30 aryl, C 1-10 alkyl, or C 1-10 alkoxy.