화학공학소재연구정보센터
Macromolecules, Vol.40, No.26, 9378-9383, 2007
Mixed chromophore perfluorocyclobutyl (PFCB) copolymers for tailored light emission
Versatile intermediates 4-bromo(trifluorovinyloxy)benzene or 4-trifluorovinyloxyphenylboronic acid pinacol ester undergo a one step Suzuki coupling reaction with commercial aryl diboronic acids or aryl dibromides and afforded three new aryltrifluorovinylether chromophore monomers. The structures of these monomers were confirmed by H-1. F-19, and C-13 NMR spectroscopy and elemental (C, H, and N) combustion analysis. The monomers were readily polymerized via thermal [2 + 2] cyclopolymerization to form chromophore containing PFCB polymers with high molecular weights (Mn = 16 700 - 22 000), superb thermal stability T-d > 450 degrees C, and excellent processability. Photoluminescence studies reveal that the fluorinated ether linkage has no effect on lumiphore emission wavelength or solution quantum yields. Copolymerization affords a facile route to tailored emission from a linear polymeric system that includes a broad range of the visible spectrum. The properties of these polymers were analyzed by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), gel permeation chromatography (GPC), and absorbance and photoluminescence spectroscopy.