N4-(dibenzo[b,d]furan-2-yl)-N4',N4'-diphenyl-N4-(2-phenylnaphtho[1,2-d]oxazol-4-yl)-[1,1'-biphenyl]-4,4'-diamine

N4,N4,N4'-triphenyl-N4'-(spiro[benzo[gh]tetraphene-8,9'-fluoren]-1-yl)-[1,1'-biphenyl]-4,4'-diamine

N4,N4,N4'-triphenyl-N4'-(triphenyleno[2,1-b]benzofuran-11-yl)-[1,1'-biphenyl]-4,4'-diamine

N4-([1,1'-biphenyl]-4-yl)-N4-(9-methyl-9H-carbazol-3-yl)-N4'-phenyl-N4'-(7-phenyl-7H-benzo[de]benzofuro[3,2-b]quinolin-10-yl)-[1,1'-biphenyl]-4,4'-diamine

N4-([1,1'-biphenyl]-4-yl)-N4'-(9,9-dimethyl-9H-fluoren-3-yl)-N4'-(4-methyl-4H-benzo[def]carbazol-2-yl)-N4-phenyl-[1,1'-biphenyl]-4,4'-diamine

N4-([1,1'-biphenyl]-4-yl)-N4'-(9,9-diphenyl-9H-fluoren-2-yl)-N4'-(4-methyl-4H-benzo[def]carbazol-2-yl)-N4-phenyl-[1,1'-biphenyl]-4,4'-diamine

N4-([1,1'-biphenyl]-4-yl)-N4-(9,9-dimethyl-9H-fluoren-2-yl)-N4'-phenyl-N4'-(2-(triphenylen-2-yl)phenyl)-[1,1'-biphenyl]-4,4'-diamine

N4,N4,N4'-triphenyl-N4'-(8-phenyl-8H-naphtho[1,2,3-kl]acridin-1-yl)-[1,1'-biphenyl]-4,4'-diamine

N4,N4,N4'-triphenyl-N4'-(6-phenylnaphthalen-2-yl)-[1,1'-biphenyl]-4,4'-diamine

N4-([1,1'-biphenyl]-4-yl)-N4'-(9,9-dimethyl-9H-fluoren-2-yl)-N4-(9-phenyl-9H-carbazol-2-yl)-N4'-(triphenylen-2-yl)-[1,1'-biphenyl]-4,4'-diamine

tetraethyl ((([1,1'-biphenyl]-4,4'-diylbis(phenylazanediyl))bis([1,1'-biphenyl]-4',4-diyl))bis(ethane-2,1-diyl))bis(phosphonate)

tetraethyl (9-(4'-(3,6-di-tert-butyl-9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-9H-carbazole-3,6-diyl)bis(phosphonate)

((([1,1'-biphenyl]-4,4'-diylbis(p-tolylazanediyl))bis(4,1-phenylene))bis(methylene))diphosphonic acid

N-([1,1'-biphenyl]-4-yl)-N-phenyl-4'-(9'-phenyl-9H,9'H-[3,3'-bicarbazol]-9-yl)-[1,1'-biphenyl]-4-amine

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

N-phenyl-N-(4'-(3-(8-phenyl-8H-fluoreno[4,5-bcd]furan-8-yl)-9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-9,9'-spirobi[fluoren]-2-amine

N-phenyl-N-(4'-(10-phenyl-7H-benzo[c]carbazol-7-yl)-[1,1'-biphenyl]-4-yl)-[1,1':4',1''-terphenyl]-4-amine