Patent ID: 8164251

Claim:
An aromatic amine derivative represented by formula (IV): wherein A 2 to A 6 each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted aryl group having 5 to 50 ring carbon atoms, a substituted or unsubstituted aralkyl group having 6 to 50 ring carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted alkoxyl group having 1 to 50 carbon atoms, a substituted or unsubstituted aryloxy group having 5 to 50 ring carbon atoms, a substituted or unsubstituted arylamino group having 5 to 50 ring carbon atoms, a substituted or unsubstituted alkylamino group having 1 to 20 carbon atoms, a substituted or unsubstituted silyl group having 1 to 20 carbon atoms or a substituted or unsubstituted heterocyclic group having 5 to 50 ring carbon atoms; a couple of A 3 and A 4 , a couple of A 4 and A 5 , and a couple of A 5 and A 6 may bond to each other to form a saturated or unsaturated ring; R 1 and R 2 each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 5 to 20 ring carbon atoms, a substituted or unsubstituted aralkyl group having 6 to 20 ring carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms or a substituted or unsubstituted silyl group having 1 to 20 carbon atoms; a represents an integer of 1 to 3; when a is 2 or greater, R 1 and R 2 may be the same with or different from each other; Ar 3 and Ar 4 each independently represents a substituted or unsubstituted aryl group having 5 to 50 ring carbon atoms; a couple of Ar 3 and Ar 4 may bond to each other to form a saturated or unsaturated ring; Ar 5 is a bivalent group made by removing one hydrogen atom from a group selected from the group consisting of a substituted or unsubstituted aryl group having 5 to 50 ring carbon atoms, a substituted or unsubstituted aralkyl group having 6 to 50 ring carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, and a substituted or unsubstituted heterocyclic group having 5 to 50 ring carbon atoms; and b represents an integer of 1 to 3; when b is 2 or greater, plural Ar 5 s may be the same with or different from each other.