Photoluminescent poly(p-phenylenevinylene)s with an aromatic oxadiazole moiety as the side chain : Synthesis, electrochemistry, and spectroscopy study

摘要: Two poly(p-phenylenevinylene) (PPV) based polymers functionalized with an electron-deficient oxadiazole segment as the side chain by mimicking chemical structure of 2-(4-biphenylyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole (PBD) have been successfully synthesized through Gilch route and Wittig method. The obtained polymer II, which is a copolymer, completely soluble in conventional organic solvents. However, I, homopolymer, not any common solvents tried. purity II characterized FT-IR, 1H NMR, 13C gel permeation chromatography (GPC), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), UV−vis photoluminescence (PL) spectroscopy, electrochemical analysis. TGA results indicate that has very high thermal stability, while DSC investigation demonstrates glass transition temperature (Tg) higher than 200 °C, might be merit for long-life operation light-emi...