N4,N4'-diphenyl-N4,N4'-bis(4'-(1,3,3a,8b-tetrahydrocyclopenta[b]indol-4(2H)-yl)-[1,1'-biphenyl]-4-yl)-[1,1'-biphenyl]-4,4'-diamine

N4,N4-diphenyl-N4',N4'-bis(4-(2-phenyl-2H-1,2,3-triazol-4-yl)phenyl)-[1,1'-biphenyl]-4,4'-diamine

N4,N4'-diphenyl-N4,N4'-bis(4-(2-phenyloxazol-5-yl)phenyl)-[1,1'-biphenyl]-4,4'-diamine

N4,N4'-bis(4-(1H-tetrazol-5-yl)phenyl)-N4,N4'-diphenyl-[1,1'-biphenyl]-4,4'-diamine

N4,N4'-diphenyl-N4,N4'-bis(4-(2-phenylthiazol-4-yl)phenyl)-[1,1'-biphenyl]-4,4'-diamine

N4,N4'-diphenyl-N4,N4'-bis(1-phenyl-3-(pyridin-4-yl)-1H-pyrazolo[3,4-b]quinolin-6-yl)-[1,1'-biphenyl]-4,4'-diamine

N4,N4'-diphenyl-N4,N4'-bis(3-(2-phenylimidazo[1,2-a]pyridin-3-yl)phenyl)-[1,1'-biphenyl]-4,4'-diamine

N4,N4'-diphenyl-N4,N4'-bis(3-(pyrimidin-5-yl)naphthalen-1-yl)-[1,1'-biphenyl]-4,4'-diamine

N4,N4'-diphenyl-N4,N4'-bis(3-(pyridin-2-yl)naphthalen-1-yl)-[1,1'-biphenyl]-4,4'-diamine

N4,N4'-diphenyl-N4,N4'-bis(3-(6-phenylpyridin-2-yl)phenyl)-[1,1'-biphenyl]-4,4'-diamine

N4,N4'-bis(3-((allyloxy)methyl)phenyl)-N4,N4'-diphenyl-[1,1'-biphenyl]-4,4'-diamine

N4,N4'-diphenyl-N4,N4'-bis(2-(trifluoromethyl)phenyl)-[1,1'-biphenyl]-4,4'-diamine

N4,N4'-diphenyl-N4,N4'-bis(6-phenylbenzo[b]naphtho[1,2-d]thiophen-5-yl)-[1,1'-biphenyl]-4,4'-diamine

N4,N4'-diphenyl-N4,N4'-bis(5-phenyl-5H-benzo[b]carbazol-3-yl)-[1,1'-biphenyl]-4,4'-diamine

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

N4,N4'-diphenyl-N4,N4'-bis(4'-(pyrrolo[1,2-a]pyrazin-7-yl)-[1,1'-biphenyl]-4-yl)-[1,1'-biphenyl]-4,4'-diamine

N4,N4'-diphenyl-N4,N4'-bis(4-(pyrazolo[1,5-a]pyridin-2-yl)phenyl)-[1,1'-biphenyl]-4,4'-diamine

N4,N4'-diphenyl-N4,N4'-bis(4-phenylnaphthalen-2-yl)-[1,1'-biphenyl]-4,4'-diamine

N4,N4'-diphenyl-N4,N4'-bis(5-phenylnaphthalen-1-yl)-[1,1'-biphenyl]-4,4'-diamine

N4-([1,1':2',1'':3'',1'''-quaterphenyl]-5''-yl)-N4',N4'-diphenyl-N4-(9-phenyl-9H-carbazol-3-yl)-[1,1'-biphenyl]-4,4'-diamine