Patent ID: 8309743

Claim:
A compound represented by general formula I: R 1 —X—R 2 , wherein R 1 and R 2 each represents an N,N-diaryl-4-aminophenyl group, or a 4-(carbazol-9-yl)phenyl group, X is one condensed ring group selected from the group consisting of following formulae X-1 to X-3: wherein R 1 is attached to a position * and R 2 is attached to a position **, and the diaryl groups for R 1 and R 2 are each independently selected from the group consisting of (i) an aryl group having 6 to 40 carbon atoms, (ii) a heteroaryl group having 2 to 40 carbon atoms, (iii) an aryl group having 6 to 40 carbon atoms which is substituted with one or more R 3 groups, and (iv) a heteroaryl group having 2 to 40 carbon atoms which is substituted with one or more R 4 groups, wherein R 3 and R 4 groups are each independently selected from Group A consisting of a halogen atom; CN; NO 2 ; OH; SiR 5 R 6 R 7 ; NR 8 R 9 ; BR 10 R 11 ; a linear, branched or cyclic alkyl group having 1 to 40 carbon atoms; a linear, branched or cyclic alkoxy group having 1 to 40 carbon atoms; and a linear, branched or cyclic thioalkoxy group having 1 to 40 carbon atoms, wherein one or more non-adjacent carbon atoms may be substituted with —CR 12 , ═CR 13 , NR 14 —, —O—, —S—, —CO—O— or —O—CO—O—, and one or more H atoms may be replaced with fluorine, or selected from Group B consisting of (i′) an aryl group having 6 to 40 carbon atoms, (ii′) a heteroaryl group having 2 to 40 carbon atoms, (iii′) an aryl group having 6 to 40 carbon atoms which is substituted with one or more R 21 groups, and (iv′) a heteroaryl group having 2 to 40 carbon atoms which is substituted with one or more R 22 groups, wherein R 21 and R 22 groups are each independently a group selected from Group A, and the groups represented by R 5 to R 14 each independently represents a group selected from a hydrogen atom, and an aliphatic or aromatic hydrocarbon group having 1 to 20 carbon atoms.