Thermal stability and electrical properties of conducting polymer based ‘polymeric–inorganic’ composites: Poly-o-anisidine and poly-o-toluidine Sn(IV) tungstate

Abstract: Newly developed organic–inorganic cation-exchange materials poly-o-anisidine and poly-o-toluidine Sn(IV) tungstate composites were synthesized by a modified sol–gel technique by incorporating Sn(IV) tungstate precipitate with the matrix of electrical conducting poly-o-anisidine and poly-o-toluidine. The materials showed good ion-exchange behavior and were used successfully in the separation of metal ions. The conductivity of the composites was measured by 4-in-line-probe DC electrical conductivity measuring device and was found within the range of 10−4–10−2 S/cm. The DC electrical conductivity of both composite materials was found stable up to 140°C under ambient conditions. The conductivity was at the border of metallic and semiconductor region. [Copyright &y& Elsevier]