Patent ID: 8227096

Claim:
An arylamine compound having a molecular weight of 1,500 to 6,000 represented by formula (1): wherein X represents a single bond, CH or CH 2 , or N or NH; Ar 1 and Ar 2 are respectively the same and each represents a substituted or unsubstituted phenylene group; R 1 , R 2 , R 3 , and R 4 each independently represents a substituted or unsubstituted aryl group wherein said substituent is at least one selected form the group consisting of a fluorine atom, a chlorine atom, a cyano group, a hydroxide group, a nitro group, an alkoxy group, an amino group, a trifluoromethyl group, a naphthyl group, an aralkyl group, a fluorenyl group, an indenyl group, a pyridyl group, a pyrimidyl group, a furanyl group, a pyronyl group, a thiophenyl group, a quinolyl group, a benzofuranyl group, a benzothiophenyl group, an indolyl group, a carbazolyl group, a bezooxazolyl group, a quinoxalyl group, a bezoimidazolyl group, a pyrazolyl group, a dibenzofuranyl group, and a dibenzothiophenyl group, and wherein the aryl group may be substituted by a diarylamine group in such a manner as to form a triphenylamine partial structure, and the aryl group at the terminal may be substituted, by repetition, by a diarylamino group in such a manner as to form a triphenylamine partial structure; m represents an integer of 0 to 2; and n represents 0 or 1.