Synthesis and Photophysical Properties of Conjugated Quinolines

Abstract

Aryl halides were prepared by condensation of 2-methylquinoline and bromo- or chloro-arylaldehydes in acetic anhydride. Diarylamines reacted with the aryl halides to afford novel triarylamine derivatives using Pd(OAc)₂/P (o-tolyl)₃ as catalyst. These compounds have potential as organic light-emitting device materials and were characterised by FT-IR, ¹H NMR and elemental analyses. The UV-vis absorption and photoluminescent spectra of the compounds in CH₂CI₂ were investigated. The lowest absorption band of the triarylamine derivatives centred at about 400 nm was assigned to a charge-transfer transition with an emission at 500–515 nm.