EPR study of polyaniline highly doped by p-toluenesulfonic acid

摘要: Abstract Magnetic, relaxation and electronic dynamic parameters of paramagnetic centers in crystalline domains polyaniline highly doped by p -toluenesulfonic acid (PANI-PTSA) as well PANI-PTSA dispersed poly(methyl methacrylate) (PANI-PTSA/PMMA) were studied the 3-cm (9.7 GHz) 2-mm (140 GHz) wavebands EPR. At both these polymers demonstrate Lorentzian single line with Dysonian contribution indicating intrinsic conductivity metal-like ca. 1500–4000 S/cm at room temperature. Effective polymer is defined Q3D delocalization charge carriers within such their Mott variable range hopping between dominating its micro- macroscopic conductivity. It was shown that interaction lattice phonons governs intradomain transfer high temperatures. Dimensionality system increases dispersion an insulating matrix. Dipole–dipole polarons oxygen biradicals reversibly changes spins initial polymers. These strongly interact below weakly above critical temperature T c phase transition leads to extremal dependence linewidth. The on electron precession frequency and/or matrix revealed. Spin dynamics analyzed be non-correlated contradicts “single conducting chain” model justifies formation domains.