N4-([1,1'-biphenyl]-4-yl)-N4-(dibenzo[b,d]furan-2-yl)-N4'-(4-methyl-4H-benzo[def]carbazol-2-yl)-N4'-phenyl-[1,1'-biphenyl]-4,4'-diamine

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

N4-([1,1'-biphenyl]-2-yl)-N4'-([1,1'-biphenyl]-4-yl)-N4-phenyl-N4'-(7-phenyl-2,3-dihydro-1H-inden-4-yl)-[1,1'-biphenyl]-4,4'-diamine

N4-([1,1'-biphenyl]-3-yl)-N4'-([1,1':2',1''-terphenyl]-4'-yl)-N4,N4'-bis(4-phenylnaphthalen-1-yl)-[1,1'-biphenyl]-4,4'-diamine

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

N4-(benzo[b]naphtho[1,2-d]thiophen-5-yl)-N4'-(7,7-dimethyl-7H-benzo[c]fluoren-9-yl)-N4,N4'-bis(4-fluorophenyl)-[1,1'-biphenyl]-4,4'-diamine

N4-(benzo[b]naphtho[2,3-d]thiophen-3-yl)-N4',N4'-diphenyl-N4-(spiro[fluorene-9,9'-thioxanthen]-3-yl)-[1,1'-biphenyl]-4,4'-diamine

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

N4-(benzo[b]naphtho[2,3-d]thiophen-3-yl)-N4'-(4-(naphthalen-2-yl)phenyl)-N4,N4'-diphenyl-[1,1'-biphenyl]-4,4'-diamine

N4-(benzo[5,6][1,4]thiazino[2,3,4-kl]phenothiazin-7-yl)-N4,N4',N4'-triphenyl-[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'-phenyl-[1,1'-biphenyl]-4,4'-diamine

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

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

N4-([1,1'-biphenyl]-3-yl)-N4',N4'-di(naphthalen-1-yl)-N4-(4-phenylnaphthalen-1-yl)-[1,1'-biphenyl]-4,4'-diamine

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

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

N4-([1,1'-biphenyl]-3-yl)-N4',N4'-bis(5,5,8,8-tetramethyl-5,8-dihydronaphthalen-1-yl)-N4-(triphenylen-2-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'-(7-phenyl-2,3-dihydro-1H-inden-4-yl)-[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,N4'-bis(4-(adamantan-1-yl)phenyl)-N4'-phenyl-[1,1'-biphenyl]-4,4'-diamine