N4,N4,N4',N4'-tetrakis(2-methoxyphenyl)-[1,1'-biphenyl]-4,4'-diamine

N4-(7,7-dimethyl-5-phenyl-5,7-dihydroindeno[2,1-b]carbazol-9-yl)-N4'-(naphtho[2,3-b]benzofuran-2-yl)-N4,N4'-diphenyl-[1,1'-biphenyl]-4,4'-diamine

N4,N4,N4',N4'-tetra(phenanthren-9-yl)-[1,1'-biphenyl]-4,4'-diamine

N4-(naphtho[1,2,3-kl]thioxanthen-1-yl)-N4,N4',N4'-triphenyl-[1,1'-biphenyl]-4,4'-diamine

N4-(9,9-dimethyl-10-phenyl-9,10-dihydroacridin-2-yl)-N4'-(4-(diphenylamino)phenyl)-N4-(4-fluorophenyl)-N4'-phenyl-[1,1'-biphenyl]-4,4'-diamine

N4-(7,12-dimethyl-7,12-dihydrobenzo[de]indolo[3,2-b]quinolin-10-yl)-N4'-(phenanthren-9-yl)-N4,N4'-diphenyl-[1,1'-biphenyl]-4,4'-diamine

N4-(9,9-dimethyl-9H-fluoren-1-yl)-N4,N4'-diphenyl-N4'-(triphenyleno[1,2-b]benzofuran-11-yl)-[1,1'-biphenyl]-4,4'-diamine

N4-(2-(7bH-indeno[1,2,3-jk]fluoren-7b-yl)phenyl)-N4,N4',N4'-tri([1,1'-biphenyl]-4-yl)-[1,1'-biphenyl]-4,4'-diamine

N4-([1,1':2',1''-terphenyl]-4'-yl)-N4,N4'-di(naphthalen-1-yl)-N4'-(6-(naphthalen-2-yl)-[1,1'-biphenyl]-3-yl)-[1,1'-biphenyl]-4,4'-diamine

N4-(9,9-dimethyl-9H-fluoren-2-yl)-N4,N4'-diphenyl-N4'-(triphenyleno[2,3-b]benzofuran-14-yl)-[1,1'-biphenyl]-4,4'-diamine

N4-(9,9-dimethyl-9H-fluoren-2-yl)-N4',N4'-diphenyl-N4-(4-phenyl-4H-benzo[def]carbazol-2-yl)-[1,1'-biphenyl]-4,4'-diamine

N-(naphthalen-2-yl)-N-(4'-(1-phenylpyrrolo[3,2-b]carbazol-5(1H)-yl)-[1,1'-biphenyl]-4-yl)naphthalen-1-amine

N3-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-N5-(2,3-dihydro-1H-inden-4-yl)-N3,N4',N4',N5-tetraphenyl-[1,1'-biphenyl]-3,4',5-triamine

N2-(4'-(diphenylamino)-[1,1'-biphenyl]-4-yl)-N7-(3-methoxyphenyl)-9,9-dimethyl-N2,N7-diphenyl-9H-fluorene-2,7-diamine

N4-([1,1':2',1''-terphenyl]-4'-yl)-N4'-(naphthalen-1-yl)-N4,N4'-bis(4-phenylnaphthalen-1-yl)-[1,1'-biphenyl]-4,4'-diamine

N-(4'-(10H-phenoxazin-10-yl)-[1,1'-biphenyl]-4-yl)-N-(naphthalen-2-yl)naphthalen-1-amine

N2-(4'-(diphenylamino)-[1,1'-biphenyl]-4-yl)-9,9-dimethyl-N2-phenyl-N7,N7-di-p-tolyl-9H-fluorene-2,7-diamine

N2-(11,11-dimethyl-11H-fluoreno[3,2-b]benzofuran-8-yl)-N2-(4'-(diphenylamino)-[1,1'-biphenyl]-4-yl)-N1,N1-diphenyldibenzo[b,d]thiophene-1,2-diamine

N-(4'-(4H-naphtho[1',8':5,6,7][1,4]diazepino[3,2,1-jk]carbazol-7-yl)-[1,1'-biphenyl]-4-yl)-N-(naphthalen-1-yl)spiro[fluorene-9,9'-thioxanthen]-1-amine

N2-(4-(tert-butyl)phenyl)-N2-(4'-(diphenylamino)-[1,1'-biphenyl]-4-yl)-9,9-dimethyl-N7,N7-diphenyl-9H-fluorene-2,7-diamine