5'-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-10,10,13c'-trimethyl-5',13c'-dihydro-10H-spiro[anthracene-9,9'-benzo[4,5]pentaleno[1,2,3-kl]acridine]

5-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-13c-methyl-9-(naphthalen-1-yl)-9,13c-dihydro-5H-indolo[3',2':4,5]cyclopenta[1,2,3-kl]acridine

5-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-9-(dibenzo[b,d]thiophen-2-yl)-13c-methyl-9,13c-dihydro-5H-indolo[3',2':4,5]cyclopenta[1,2,3-kl]acridine

5-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-8-([1,1':3',1''-terphenyl]-2'-yl)-5,8-dihydroindolo[2,3-c]carbazole

N,N-di([1,1'-biphenyl]-4-yl)-4'-(13c-methyl-9,9-diphenyl-9,13c-dihydro-5H-benzo[4,5]pentaleno[1,2,3-kl]acridin-5-yl)-[1,1'-biphenyl]-4-amine

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

4,4'-di(12H-4-thia-8-selena-12-aza-3a2-boradibenzo[cd,mn]pyren-12-yl)-1,1'-biphenyl

4,4'-bis(7,12-dihydro-5H-7,12-[1,2]benzenonaphtho[2,3-b]carbazol-5-yl)-1,1'-biphenyl

4,4'-bis(4-(2-phenylbenzo[b]thiophen-4-yl)-9H-carbazol-9-yl)-1,1'-biphenyl

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

4,4'-bis(3,6-bis(furo[2,3-c]pyridin-2-yl)-9H-carbazol-9-yl)-1,1'-biphenyl

4,4'-bis(3-(furo[3,2-c]pyridin-2-yl)-6-isopropyl-9H-carbazol-9-yl)-1,1'-biphenyl

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

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

4,4'-bis(3-(adamantan-1-yl)-6-(furo[2,3-d]pyridazin-2-yl)-9H-carbazol-9-yl)-1,1'-biphenyl

4,4'-bis(3-(5-phenylbenzo[b]thiophen-2-yl)-9H-carbazol-9-yl)-1,1'-biphenyl

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

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

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

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