Patent ID: 7425653

Claim:
An aromatic amine derivative represented by the following general formula (1): wherein A 1 to A 4 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 ring 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 heterocyclic group having 3 to 50 ring carbon atoms, a substituted or unsubstituted silyl group having 3 to 50 carbon atoms or a halogen atom; a, b, c and d each independently represents an integer of 0 to 5, when a, b, c or d each is 2 or greater, A 1 to A 4 may be the same with or different from each other, and may bond each other to form a saturated or unsaturated ring; and further, a couple of A 1 and A 2 , and a couple of A 3 and A 4 may bond each other to form a saturated or unsaturated ring; R 1 to R 4 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 arylamino group having 5 to 20 ring carbon atoms, a substituted or unsubstituted alkylamino group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 50 ring carbon atoms or a substituted or unsubstituted silyl group having 3 to 50 carbon atoms; a couple of R 1 and R 2 , and a couple of R 3 and R 4 may bond each other to form a saturated or unsaturated ring; however, a case where all of R 1 to R 4 in the general formula (1) are hydrogen atoms is excluded.