N,N-diphenyl-4'-(7'H-spiro[adamantane-2,13'-chromeno[2,3-b]carbazol]-7'-yl)-[1,1'-biphenyl]-4-amine

N,N-diphenyl-4'-(9-phenyl-12H-benzo[5,6][1,4]dioxino[2,3-a]carbazol-12-yl)-[1,1'-biphenyl]-4-amine

N,N-diphenyl-4'-(3-phenyl-7-(9-phenyl-9H-carbazol-3-yl)pyrrolo[3,2-a]carbazol-10(3H)-yl)-[1,1'-biphenyl]-4-amine

N,N-diphenyl-4'-(8-phenyl-6,8-diazabenzo[6,7]naphtho[2',1',8':3,4,5]azuleno[1,8-bc]fluoren-6(8H)-yl)-[1,1'-biphenyl]-4-amine

N,N-diphenyl-4'-(7-phenylbenzo[g]indolo[2,3-b]carbazol-9(7H)-yl)-[1,1'-biphenyl]-4-amine

N,N-diphenyl-4'-(5'H-spiro[dibenzo[b,d]silole-5,10'-dibenzo[b,e][1,4]azasilin]-5'-yl)-[1,1'-biphenyl]-4-amine

N,N-diphenyl-4'-(12-(triphenylen-2-yl)-7H-benzofuro[2,3-b]carbazol-7-yl)-[1,1'-biphenyl]-4-amine

N,N-diphenyl-4'-(14-phenyl-1,14-dihydrobenzo[h]indolo[2,3-a]carbazol-13-yl)-[1,1'-biphenyl]-4-amine

N,N-diphenyl-4'-(12-phenylbenzo[a]indolo[2,3-g]carbazol-5(12H)-yl)-[1,1'-biphenyl]-4-amine

N,N-diphenyl-4'-(1-phenylpyrrolo[2,3-b]carbazol-9(1H)-yl)-[1,1'-biphenyl]-4-amine

N,N-diphenyl-4'-(2-phenyl-7H-benzo[c]carbazol-7-yl)-[1,1'-biphenyl]-4-amine

N,N-diphenyl-4'-(10-phenyl-7,10-dihydrobenzo[c]indolo[2,3-g]carbazol-3-yl)-[1,1'-biphenyl]-4-amine

N-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-N-(4-(triphenylsilyl)phenyl)-[1,1':4',1''-terphenyl]-4-amine

N-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-N-(4-(benzofuran-5-yl)phenyl)spiro[adamantane-2,9'-fluoren]-2'-amine

N-(4-(benzo[d]oxazol-5-yl)phenyl)-4'-(9H-carbazol-9-yl)-N-(4-(dibenzo[b,d]thiophen-2-yl)phenyl)-[1,1'-biphenyl]-4-amine

N-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-N-(4-(benzo[d]thiazol-5-yl)phenyl)dibenzo[b,d]furan-3-amine

N,N-di([1,1'-biphenyl]-4-yl)-4'-(7-(dibenzo[b,d]thiophen-4-yl)-3-phenylpyrrolo[3,2-a]carbazol-10(3H)-yl)-[1,1'-biphenyl]-4-amine

N4,N4'-bis(dimethoxy(methyl)silyl)-N4,N4'-diphenyl-N4,N4'-di-m-tolyl-[1,1'-biphenyl]-4,4'-diaminium chloride

N-(4-(4-(benzo[c]phenanthren-5-yl)dibenzo[b,d]thiophen-1-yl)phenyl)-4'-(9H-carbazol-9-yl)-N-phenyl-[1,1'-biphenyl]-4-amine

N-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-N-(4-(benzo[d]oxazol-4-yl)phenyl)-9,9-diphenyl-9H-fluoren-2-amine