The synthesis and photophysical properties of novel triphenylamine derivatives containing α, β-diarylacrylonitrile

摘要

α,β-Diarylacrylonitrile halides were prepared by condensation of appropriate arylaldehydes and arylacetonitrile halides using a catalytic amount of NaOCH3 at room temperature. The diarylamines were reacted with various α,β-diarylacrylonitrile halides to afford several triphenylamine compounds, which displayed efficient hole transportation in the presence of Pd(OAc)2/P(o-tolyl)3 catalyst, thereby constituting organic light emitting device materials. The novel triphenylamine derivatives were characterized using FTIR, ~1H NMR, 13C NMR, MS and elemental analysis. The UV-vis absorption and photoluminescence spectra of the compounds were investigated. The lowest absorption band of α,β-diarylacrylonitrile-containing, triphenylamine derivatives, which occurred at ~400 nm, was assigned to charge-transfer transitions with an emission at 500-574 nm in different solutions and in the solid state.