4'-(12H-6-oxa-12-azaindeno[2,1,7,6-ghij]pleiaden-12-yl)-N-([1,1'-biphenyl]-4-yl)-N-(4-(tert-butyl)phenyl)-[1,1'-biphenyl]-4-amine

3-(benzofuran-2-yl)-6-methyl-9-(4'-(3-methyl-6-phenyl-9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-9H-carbazole

3-(benzofuran-2-yl)-9-(4'-(3-(4-(tert-butyl)phenyl)-9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-9H-carbazole

N,N-di([1,1'-biphenyl]-4-yl)-4'-(1H-azepino[2,3,4,5-def:6,7,1-j'k']dicarbazol-1-yl)-[1,1'-biphenyl]-4-amine

N,N-di([1,1'-biphenyl]-4-yl)-4'-(13c-methylspiro[benzo[4,5]pentaleno[1,2,3-kl]acridine-9,9'-xanthene]-5(13cH)-yl)-[1,1'-biphenyl]-4-amine

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

4,4'-bis(4-(5,6-dimethylbenzofuran-2-yl)-9H-carbazol-9-yl)-1,1'-biphenyl

4,4'-bis(3-(oxazolo[4,5-b]pyrazin-2-yl)-10H-phenoxazin-10-yl)-1,1'-biphenyl

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

4,4'-bis(3-(thieno[2,3-d]pyridazin-2-yl)-9H-carbazol-9-yl)-1,1'-biphenyl

4,4'-bis(3-(thieno[3,2-b]pyridin-2-yl)-9H-carbazol-9-yl)-1,1'-biphenyl

4,4'-bis(4-(benzo[d]oxazol-2-yl)-9H-carbazol-9-yl)-1,1'-biphenyl

4,4'-bis(3-(5,6-dimethylbenzo[d]thiazol-2-yl)-9H-carbazol-9-yl)-1,1'-biphenyl

4,4'-bis(3-(5-(tert-butyl)benzo[d]oxazol-2-yl)-9H-carbazol-9-yl)-1,1'-biphenyl

4,4'-bis(3-(5-(adamantan-1-yl)benzofuran-2-yl)-9H-carbazol-9-yl)-1,1'-biphenyl

4,4'-bis(3-(2-phenylfuro[3,2-c]pyridin-7-yl)-9H-carbazol-9-yl)-1,1'-biphenyl

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

4,4'-bis(3-(5-methylbenzo[d]thiazol-2-yl)-9H-carbazol-9-yl)-1,1'-biphenyl

4,4'-bis(3-(benzo[d]oxazol-2-yl)-10H-phenothiazin-10-yl)-1,1'-biphenyl

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