N4-([1,1'-biphenyl]-2-yl)-N4-([1,1'-biphenyl]-4-yl)-N4'-(9,9-dimethyl-9H-fluoren-2-yl)-N4'-(9-phenyl-9H-carbazol-3-yl)-[1,1'-biphenyl]-4,4'-diamine

N4-([1,1'-biphenyl]-2-yl)-N4-(11,11-dimethyl-10,11-dihydro-5H-5,10-[1,2]benzenodibenzo[a,d][7]annulen-8-yl)-N4'-(naphthalen-1-yl)-N4'-phenyl-[1,1'-biphenyl]-4,4'-diamine

N4-(9-methyl-9H-carbazol-2-yl)-N4'-(9-methyl-9H-dibenzo[a,c]carbazol-12-yl)-N4'-phenyl-N4-(triphenylen-2-yl)-[1,1'-biphenyl]-4,4'-diamine

N4-(benzo[b]naphtho[1,2-d]thiophen-5-yl)-N4-(11,11-dimethyl-11H-fluoreno[3,2-b]benzofuran-8-yl)-N4'-(4-fluorophenyl)-N4'-phenyl-[1,1'-biphenyl]-4,4'-diamine

N4-(benzo[b]naphtho[2,3-d]thiophen-2-yl)-N4,N4'-bis(5,5-dimethyl-5H-dibenzo[b,d]silol-3-yl)-N4'-(naphthalen-1-yl)-[1,1'-biphenyl]-4,4'-diamine

N4-(9,9-diphenyl-9H-fluoren-2-yl)-N4'-(9-(hex-5-en-1-yl)-9-phenyl-9H-fluoren-2-yl)-N4,N4'-diphenyl-[1,1'-biphenyl]-4,4'-diamine

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

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

N4-([1,1'-biphenyl]-3-yl)-N4'-([1,1'-biphenyl]-4-yl)-N4-(4-(2,3-dihydro-1H-inden-4-yl)phenyl)-N4'-phenyl-[1,1'-biphenyl]-4,4'-diamine

N4-(9,9-dimethyl-9H-fluoren-3-yl)-N4',N4'-diphenyl-N4-(triphenyleno[2,1-b]benzofuran-8-yl)-[1,1'-biphenyl]-4,4'-diamine

N4-([1,1'-biphenyl]-3-yl)-N4',N4'-di([1,1'-biphenyl]-4-yl)-N4-(5-ethyl-7-methyl-5,7-dihydroindolo[2,3-b]carbazol-2-yl)-[1,1'-biphenyl]-4,4'-diamine

N4-([1,1'-biphenyl]-3-yl)-N4,N4'-bis(4-(benzo[d]thiazol-2-yl)phenyl)-N4'-phenyl-[1,1'-biphenyl]-4,4'-diamine

N4-([1,1'-biphenyl]-3-yl)-N4,N4'-diphenyl-N4'-(7-phenyl-7H-benzo[de]benzofuro[3,2-b]quinolin-10-yl)-[1,1'-biphenyl]-4,4'-diamine

N4-([1,1'-biphenyl]-3-yl)-N4'-([1,1'-biphenyl]-4-yl)-N4,N4'-bis(4-(2,3-dihydro-1H-inden-5-yl)phenyl)-[1,1'-biphenyl]-4,4'-diamine

N4-([1,1'-biphenyl]-3-yl)-N4'-([1,1'-biphenyl]-4-yl)-N4-(2,3-dihydro-1H-inden-4-yl)-N4'-(naphthalen-1-yl)-[1,1'-biphenyl]-4,4'-diamine

N4-([1,1'-biphenyl]-3-yl)-N4'-(naphthalen-1-yl)-N4,N4'-bis(2-(naphthalen-1-yl)phenyl)-[1,1'-biphenyl]-4,4'-diamine

N4-(7,12-bis(4-(tert-butyl)phenyl)-7,12-dihydrobenzo[de]indolo[3,2-b]quinolin-10-yl)-N4,N4',N4'-triphenyl-[1,1'-biphenyl]-4,4'-diamine

N4-(3',5',5',8',8'-pentamethyl-5',8'-dihydro-[2,2'-binaphthalen]-6-yl)-N4'-phenyl-N4-(5,5,8,8-tetramethyl-5,8-dihydronaphthalen-1-yl)-N4'-(triphenylen-2-yl)-[1,1'-biphenyl]-4,4'-diamine

N4-(7-(adamantan-1-yl)-9,9-dimethyl-9H-fluoren-2-yl)-N4'-(naphthalen-2-yl)-N4,N4'-diphenyl-[1,1'-biphenyl]-4,4'-diamine

N4-(4-chlorophenyl)-N4'-(4'-((4-chlorophenyl)(phenyl)amino)-[1,1'-biphenyl]-4-yl)-N4-phenyl-N4'-(m-tolyl)-[1,1'-biphenyl]-4,4'-diamine