Multi-aromatic amine series
biphen-4-yl amine
10-bromo-7(H)-benzo[c]carbazole
7(H)-benzo[c]carbazole
10-bromo-7-phenyl-benzo[c]carbazole
N-(4-biphenyl)-(9,9-dimethylfluoren-2-yl) Amine
3-(4-bromophenyl)-N-phenyl-9H-Carbazole
7H-dibenzo[c,g]carbazole
9H-Pyrido[3,4-b]indole
11,12-dihydroindolo[2,3-a]carbazole
11,12-Dihyrdoindolo[2,3-a]carbazole