MAGNETIC AND ELECTRICAL-PROPERTIES OF 2 POLYANILINE FAMILIES-PANI-H3PO4 AND PANI-C4H6O6

We report a comparative study between two kinds of polyaniline, PANI-H 3PO4 and PANI-C4H6O6. We have measured the temperature dependence of t he de-conductivity sigma(dc)(T) and magnetic susceptibility chi(T)(T). The structure of polyaniline was characterized by Fourier transform i nfrared technique, electron-spin-resonance and X-ray diffraction. Poly aniline synthesized with phosphoric and tartaric acids leads to high m agnetic susceptibility chi(T)(at T = 295 K) approximate to 10(-4) emu/ mol. 2rings. The de-conductivity of both kinds of PANI shows a semicon ductor behavior and follows the quasi-one-dimensional variable-range-h opping model. A comparison of the magnetic susceptibility shows greate r electron localization in PANI-C4H6O6, which is in agreement with the lower conductivity at room temperature for PANI-C4H6O6.