Synthesis and Properties of Polyaniline Doped with Cobalt Substituted Silicotungstate Isomers in Keggin Structure

The polyaniline hybrid materials doped with cobalt substituted silicotungstate isomers α, βi-K6-nHn[SiW11 Co(H2O)O39]·xH2O (βi=β1, β2, β3) have been prepared. The materials were characterized by elemental analysis, IR spectrascopy, UV-Vis, scanning electron microscopy (SEM), TG and X-ray powder diffraction (XRD). Fluorescence and conductivity of the materials were determined. The results indicate that SiW11Co/PANI have better thermal stability, fluorescence and conductivity; the conductivity of the materials is 7.5 × 10-2 S·cm-1 at room temperature. Each of the polyaniline hybrid materials has one emission spectrum from the transition of the electrons between exciton band (produced due to doping) and valence band.