Nanosized effects in composites based on polyaniline and vanadium or iron oxides

It has been established by means of elemental analysis, X-ray diffraction, IR and optical spectroscopies, cyclic voltammetry and EPR that, due to the nanostructure, the composites based on polyaniline (PAn) and on vanadium or iron oxides display consistent specific spectral, electrochemical, magneti c properties which are associated with intermolecular interaction with char ge transfer between conducting polymer and inorganic component of the compo sites and with formation of the united electronic system. The nanosized eff ects in both composites explored possess similarity as well as distinctions . While in the PAn-V2O5 nanocomposite direct interaction of the polyaniline macromolecules, intercalated in the V2O5 galleries, with V5+ ions takes pl ace, resulting in charge transfer, the charge transfer between polyaniline and Fe3O4 particles of the PAn-Fe3O4 nanocomposite is motivated by the fact that during the synthesis of the composite the Fe3O4 particles in the star ting sol and in the reaction medium carry a certain surface charge which th ey retain in the composite, thus acting as peculiar extra dopants for macro molecules of the conducting polymer.