N4-(naphtho[2,3-b]benzofuran-3-yl)-N4,N4'-diphenyl-N4'-(7,7,12,12-tetramethyl-7,12-dihydroindeno[1,2-a]fluoren-2-yl)-[1,1'-biphenyl]-4,4'-diamine

N4-(9,9-dimethyl-10-phenyl-9,10-dihydroacridin-2-yl)-N4-(naphthalen-1-yl)-N4'-phenyl-N4'-(4-(9-phenyl-9H-carbazol-2-yl)phenyl)-[1,1'-biphenyl]-4,4'-diamine

N4-(9,9-dimethyl-9H-fluoren-1-yl)-N4,N4'-diphenyl-N4'-(triphenyleno[1,2-b]benzofuran-13-yl)-[1,1'-biphenyl]-4,4'-diamine

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

N4-(2-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-N4'-([1,1':2',1''-terphenyl]-4'-yl)-N4,N4'-diphenyl-[1,1'-biphenyl]-4,4'-diamine

N4,N4'-(1,2-phenylene)bis(N4',N4'-diphenyl-N4-(4-vinylphenyl)-[1,1'-biphenyl]-4,4'-diamine)

N4-(9-([1,1':4',1''-terphenyl]-4-yl)-9H-carbazol-3-yl)-N4,N4',N4'-triphenyl-[1,1'-biphenyl]-4,4'-diamine

N4-(11,11-dimethyl-11H-indeno[1,2-b]dibenzo[b,e][1,4]dioxin-8-yl)-N4-(naphtho[2,3-b]benzofuran-3-yl)-N4',N4'-di-p-tolyl-[1,1'-biphenyl]-4,4'-diamine

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

N4-(7,7-dimethyl-7H-benzo[c]fluoren-9-yl)-N4-(4-methyl-4H-benzo[def]carbazol-2-yl)-N4',N4'-diphenyl-[1,1'-biphenyl]-4,4'-diamine

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

N4-(8-([1,1'-biphenyl]-4-yl)-8H-naphtho[1,2,3-kl]acridin-1-yl)-N4,N4',N4'-triphenyl-[1,1'-biphenyl]-4,4'-diamine

N3-([1,1'-biphenyl]-4-yl)-N3-(4'-(diphenylamino)-[1,1'-biphenyl]-4-yl)-N11,N11-diphenylnaphtho[2,3-b]benzofuran-3,11-diamine

N4-(9,9-dimethyl-9H-fluoren-2-yl)-N4,N4'-diphenyl-N4'-(triphenyleno[1,2-b]benzofuran-12-yl)-[1,1'-biphenyl]-4,4'-diamine

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

N4-([1,1':2',1''-terphenyl]-4'-yl)-N4'-(9,9-dimethyl-9H-fluoren-2-yl)-N4-phenyl-N4'-(triphenylen-2-yl)-[1,1'-biphenyl]-4,4'-diamine

N4-([1,1'-binaphthalen]-6-yl)-N4-([1,1'-biphenyl]-3-yl)-N4',N4'-diphenyl-[1,1'-biphenyl]-4,4'-diamine

N2-(9,9-dimethyl-9H-fluoren-2-yl)-N7-(4'-(diphenylamino)-[1,1'-biphenyl]-4-yl)-N2-isopropyl-9,9-dimethyl-N7-(4-methyl-4H-benzo[def]carbazol-2-yl)-9H-fluorene-2,7-diamine

N2-(4'-(di([1,1'-biphenyl]-4-yl)amino)-[1,1'-biphenyl]-4-yl)-N7,N7,9,9-tetramethyl-N2-(4-methyl-4H-benzo[def]carbazol-2-yl)-9H-fluorene-2,7-diamine

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