N,N-diphenyl-4'-(5'-phenylspiro[fluorene-9,15'-indeno[1,2-a]indolo[3,2-c]carbazol]-10'(5'H)-yl)-[1,1'-biphenyl]-4-amine

4'-(4H-dibenzo[5,6:7,8][1,4]diazocino[3,2,1-jk]carbazol-4-yl)-N,N-diphenyl-[1,1'-biphenyl]-4-amine

N,N-diphenyl-4'-(5,15,15-triphenyl-5H-indeno[1,2-a]indolo[3,2-c]carbazol-10(15H)-yl)-[1,1'-biphenyl]-4-amine

4-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-10,11-diphenyl-4H-4-azabenzo[ij]naphtho[2,1,8-cde]azulene

10-(4'-(diphenylamino)-[1,1'-biphenyl]-4-yl)-10H-phenothiazine 5,5-dioxide

4'-(7,7-diphenylbenzo[c]acridin-12(7H)-yl)-N,N-diphenyl-[1,1'-biphenyl]-4-amine

4'-(7H-benzo[c]carbazol-7-yl)-N-(4-(dibenzo[b,d]thiophen-4-yl)phenyl)-N-phenyl-[1,1'-biphenyl]-4-amine

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

N-([1,1'-biphenyl]-4-yl)-4'-(19H-benzo[7',8']carbazolo[3',2':4,5]imidazo[1,2-f]phenanthridin-19-yl)-N-phenyl-[1,1'-biphenyl]-4-amine

4'-(13c-methylbenzofuro[3',2':4,5]cyclopenta[1,2,3-kl]acridin-5(13cH)-yl)-N,N-diphenyl-[1,1'-biphenyl]-4-amine

4'-(13H-dibenzo[a,i]carbazol-13-yl)-N,N-diphenyl-[1,1'-biphenyl]-4-amine

4'-(14,14-dimethyldibenzo[a,j]acridin-7(14H)-yl)-N,N-diphenyl-[1,1'-biphenyl]-4-amine

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

4'-(16H-benzo[a]phenanthro[9,10-h]carbazol-16-yl)-N,N-diphenyl-[1,1'-biphenyl]-4-amine

4'-(1H-benzo[3,4]naphtho[2',3':5,6]azuleno[1,8,7-cde]quinolin-1-yl)-N,N-diphenyl-[1,1'-biphenyl]-4-amine

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

4'-(3,6-bis(6-(benzo[b]thiophen-2-yl)pyridazin-3-yl)-9H-carbazol-9-yl)-N,N-diphenyl-[1,1'-biphenyl]-4-amine