A new pyridylamine for blue light electroluminescent devices

The new pyridylamine, N,N′-bis(1-naphthyl)-N,N′-diphenyl-2,6-diaminopyridine (NPP), in which the nitrogen atoms form a linear array, was synthesized by the reaction of 2,6-dibromopyridine with N-phenyl-1-naphthylamine. This compound emits an intense blue color (λ=443 nm, Φf=0.74) upon irradiation by UV light and is suitable for use as an emitting layer in an electroluminescent device.