4,4'-bis(3-chloro-9H-carbazol-9-yl)-1,1'-biphenyl

4,4'-bis(3-(2-(4-vinylphenyl)propan-2-yl)-9H-carbazol-9-yl)-1,1'-biphenyl

4,4'-bis(3,6-di(naphthalen-2-yl)-9H-carbazol-9-yl)-1,1'-biphenyl

4,4'-bis(3-(dibenzo[b,d]thiophen-4-yl)-9H-carbazol-9-yl)-1,1'-biphenyl

4,4'-bis(3,6-bis(3-methoxyphenyl)-9H-carbazol-9-yl)-1,1'-biphenyl

4,4'-bis(2,7-bis(trifluoromethyl)-9H-carbazol-9-yl)-1,1'-biphenyl

4,4'-bis(12-chloro-9H-dibenzo[a,c]carbazol-9-yl)-1,1'-biphenyl

4,4'-bis(3-(bromomethyl)-9H-carbazol-9-yl)-1,1'-biphenyl

4,4'-bis(2-(tert-butyl)-9H-carbazol-9-yl)-1,1'-biphenyl

N-(4'-(4H-4,8b-diazaindeno[1,2,3-gh]pleiaden-4-yl)-[1,1'-biphenyl]-4-yl)-N-([1,1'-biphenyl]-2-yl)-9-(naphthalen-1-yl)-9H-carbazol-1-amine

N-(4'-(4H-4,8b-diazaindeno[1,2,3-gh]pleiaden-4-yl)-[1,1'-biphenyl]-4-yl)-N-([1,1'-biphenyl]-2-yl)-9-(naphthalen-2-yl)-9H-carbazol-4-amine

N-(4'-(4H-naphtho[1',8':5,6,7][1,4]diazepino[3,2,1-jk]carbazol-7-yl)-[1,1'-biphenyl]-4-yl)-9-(dibenzo[b,d]furan-4-yl)-N-phenyl-9H-carbazol-3-amine

9-(dibenzo[b,d]furan-4-yl)-N-phenyl-N-(4'-(12-phenylbenzo[b]naphtho[1,8-ef][1,4]diazepin-7(12H)-yl)-[1,1'-biphenyl]-4-yl)-9H-carbazol-3-amine

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

9-(4'-(5H-benzo[b]carbazol-5-yl)-[1,1'-biphenyl]-4-yl)-7-(4-(trimethylsilyl)phenyl)-7,9-dihydrobenzo[g]indolo[2,3-b]carbazole

9-(4-((4'-(9,9'-spirobi[fluoren]-7-yl(phenyl)amino)-[1,1'-biphenyl]-4-yl)(phenyl)amino)phenyl)-9H-carbazole-3,6-dicarbonitrile

9-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-9H-benzo[kl]naphtho[1',2':4,5]furo[2,3-a]acridine

9-(4'-([1,1'-biphenyl]-4-yl(naphthalen-2-yl)amino)-[1,1'-biphenyl]-4-yl)-9H-carbazole-3-carbonitrile

N-(4'-(4H-naphtho[1',8':5,6,7][1,4]diazepino[3,2,1-jk]carbazol-7-yl)-[1,1'-biphenyl]-4-yl)-9-(dibenzo[b,d]thiophen-2-yl)-N-phenyl-9H-carbazol-2-amine

9-(dibenzo[b,d]thiophen-2-yl)-N-phenyl-N-(4'-(12-phenylbenzo[b]naphtho[1,8-ef][1,4]diazepin-7(12H)-yl)-[1,1'-biphenyl]-4-yl)-9H-carbazol-1-amine