N-([1,1'-biphenyl]-4-yl)-N-(4'-(2-(8-phenyl-8H-fluoreno[4,5-bcd]furan-8-yl)-9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-[1,1':4',1''-terphenyl]-4-amine

N-([1,1'-biphenyl]-4-yl)-9-phenyl-N-(4'-(1,1,9,9-tetramethyl-1H-dibenzo[f,i]fluoreno[4,5-bcd]azecin-14(9H)-yl)-[1,1'-biphenyl]-4-yl)-9H-carbazol-2-amine

N-([1,1'-biphenyl]-4-yl)-N-(4'-(13c-methylbenzo[4',5']thieno[3',2':4,5]cyclopenta[1,2,3-kl]acridin-5(13cH)-yl)-[1,1'-biphenyl]-4-yl)phenanthren-9-amine

N-([1,1'-biphenyl]-4-yl)-4'-(9H-carbazol-9-yl)-N-(4-(7,7-dimethyl-7H-benzo[b]fluoreno[3,4-d]thiophen-1-yl)phenyl)-[1,1'-biphenyl]-4-amine

N-([1,1'-biphenyl]-4-yl)-4'-(9H-dibenzo[b,d]naphtho[2,1-f]azepin-9-yl)-N-phenyl-[1,1'-biphenyl]-4-amine

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

N-([1,1'-biphenyl]-4-yl)-4'-(9H-carbazol-9-yl)-N-(4-(3-(8-phenyl-8H-fluoreno[4,5-bcd]furan-8-yl)-9H-carbazol-9-yl)phenyl)-[1,1'-biphenyl]-4-amine

N-([1,1'-biphenyl]-4-yl)-4'-(3,6-di(benzofuran-2-yl)-9H-carbazol-9-yl)-N-(4-(2,3-dihydro-1H-inden-4-yl)phenyl)-[1,1'-biphenyl]-4-amine

N-([1,1'-biphenyl]-4-yl)-4'-(2-(adamantan-1-yl)-7-(benzofuran-2-yl)-9H-carbazol-9-yl)-N-(4-(benzofuran-2-yl)phenyl)-[1,1'-biphenyl]-4-amine

N-([1,1'-biphenyl]-4-yl)-4'-(15H-benzo[h]fluoreno[1,9-ab]carbazol-15-yl)-N-phenyl-[1,1'-biphenyl]-4-amine

N-(4-(dibenzo[b,d]furan-4-yl)phenyl)-N-(4'-(3-(8-phenyl-8H-fluoreno[4,5-bcd]thiophen-8-yl)-9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)naphthalen-2-amine

N-(4-(benzofuran-2-yl)phenyl)-N-(4'-(3,6-bis(5-methylbenzofuran-2-yl)-9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-[1,1'-biphenyl]-3-amine

N-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-N-(dibenzo[b,d]furan-1-yl)-9-phenylphenanthro[2,3-d]oxazol-1-amine

N-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-N-([1,1'-biphenyl]-4-yl)spiro[indolo[3,2,1-de]acridine-8,9'-xanthen]-12-amine

N-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-N-([1,1'-biphenyl]-4-yl)-7',8',9',10'-tetrahydrospiro[adamantane-2,11'-benzo[a]fluoren]-5'-amine

N-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-N-(5,5-dimethyl-5H-dibenzo[b,d]silol-3-yl)-1-azaspiro[adamantane-4,9'-fluoren]-4'-amine

N-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-N-([1,1'-biphenyl]-2-yl)benzo[4',5']thieno[2',3':7,8]naphtho[1,2-b]benzofuran-8-amine

N-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-N-([1,1'-biphenyl]-3-yl)-7,7-dimethyl-7H-benzo[b]fluoreno[3,4-d]thiophen-1-amine

N-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-N-([1,1'-biphenyl]-4-yl)-7,7-dimethyl-7H-fluoreno[4,3-b]benzofuran-1-amine

N-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-N-(4'-(trimethylsilyl)-[1,1'-biphenyl]-2-yl)dibenzo[b,d]furan-1-amine