Patent ID: 8362246

Claim:
A compound of the formula wherein Ar 1 , Ar 2 , Ar 1′ and Ar 2′ are independently of each other a C 6 -C 24 aryl group, or a C 2 -C 30 heteroaryl group, which can optionally be substituted by G, a C 4 -C 18 cycloalkyl group, a C 6 -C 10 aryl group, a C 6 -C 10 aryl group which is substituted by a C 1 -C 8 alkyl group, a C 2 -C 5 heteroaryl group, or a C 2 -C 5 heteroaryl group, which is substituted by a C 1 -C 8 alkyl group, R 1 and R 2 can be the same or different at each occurrence and are F, CN, NR 45 R 45′ , a C 1 -C 25 alkyl group, a C 4 -C 18 cycloalkyl group, a C 1 -C 25 alkoxy group which is substituted by E or interrupted by D, a C 6 -C 24 aryl group, a C 6 -C 24 aryl group which is substituted by G, a C 2 -C 30 heteroaryl group, a C 2 -C 30 heteroaryl group, which is substituted by G, m and n are 0, 1, 2, 3, or 4, D is —CO—, —COO—, —S—, —SO—, —SO 2 —, —O—, —NR 65 —, —SiR 70 R 71 —, —POR 72 —, —CR 63 ═CR 64 —, or —C≡C—, E is —OR 69 , —SR 69 , —NR 65 R 66 , —COR 68 , —COOR 67 , —CONR 65 R 66 , —CN, or halogen, G is E, or C 1 -C 25 alkyl, R 45 and R 45′ are independently of each other a C 1 -C 25 alkyl group, a C 4 -C 18 cycloalkyl group, in which one or more carbon atoms which are not in neighborhood to each other could be replaced by —NR 45″ —, —O—, —S—, —C(═O)—O—, or, —O—C(═O)—O—, and/or wherein one or more hydrogen atoms can be replaced by F, a C 6 -C 24 aryl group, or a C 6 -C 24 aryloxy group, wherein one or more carbon atoms can be replaced by O, S, or N, and/or which can be substituted by one or more non-aromatic groups R 1 , and R 45″ is a C 1 -C 25 alkyl group, or a C 4 -C 18 cycloalkyl group, R 63 and R 64 are independently of each other H, C 6 -C 18 aryl; C 6 -C 18 aryl which is substituted by C 1 -C 18 alkyl, or C 1 -C 18 alkoxy; C 1 -C 18 alkyl; or C 1 -C 18 alkyl which is interrupted by —O—; R 65 and R 66 are independently of each other C 6 -C 18 aryl; C 6 -C 18 aryl which is substituted by C 1 -C 18 alkyl, or C 1 -C 18 alkoxy; C 1 -C 18 alkyl; or C 1 -C 18 alkyl which is interrupted by —O—; or R 65 and R 66 together form a five or six membered ring, or ring system; R 67 is C 6 -C 18 aryl; C 6 -C 18 aryl which is substituted by C 1 -C 18 alkyl, or C 1 -C 18 alkoxy; C 1 -C 18 alkyl; or C 1 -C 18 alkyl which is interrupted by —O—, R 68 is H; C 6 -C 18 aryl; C 6 -C 18 aryl which is substituted by C 1 -C 18 alkyl, or C 1 -C 18 alkoxy; C 1 -C 18 alkyl; or C 1 -C 18 alkyl which is interrupted by —O—, R 69 is C 6 -C 18 aryl; C 6 -C 18 aryl, which is substituted by C 1 -C 18 alkyl, or C 1 -C 18 alkoxy; C 1 -C 18 alkyl; or C 1 -C 18 alkyl which is interrupted by —O—, R 70 and R 71 are independently of each other C 1 -C 18 alkyl, C 6 -C 18 aryl, or C 6 -C 18 aryl, which is substituted by C 1 -C 18 alkyl, and R 72 is C 1 -C 18 alkyl, C 6 -C 18 aryl, or C 6 -C 18 aryl, which is substituted by C 1 -C 18 alkyl.