“…N,N 0 -diphenyl-N,N 0 -bis(3-methylphenyl)-1, 1 0 -diphenyl-4, 4 0 -diamine (TPD), 1,3,5-tris(N-phenylbenzimidazol-2-yl)benzene (TPBI), 4-(dicyanomethylene)-2-t-butyl-6-(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran (DCJTB) were prepared by general methods and purified by train sublimation before use. Compound 5,6-Bis-[4-(naphthalene-1-yl-phenyl-amino)-phenyl]-pyrazine-2,3-dicarbonitrile (BNPPDC) was prepared similarly to the method described in the literature with slight modification [14,15].…”