Spin diffusion, conductive polymers, charge

The frequency dependence of NMR spin-lattice relaxation is also a powerful tool in the study of spin dynamics in tlie conducting polymers, to reveal the microscopic dynamics of the charge carrier, polaron and/or conduction electron spins. However, one has to pay attention to one important point the localized paramagnetic spins and molecular motion which substantially contribute to the NMR 77]]. Since the relaxation caused by the spins diffusing is suppressed by a factor of D, the contribution due to the localized spins and the molecular motions could become dominant [6]. Therefore, interpretation of the NMR relaxation rate is generally useful but difficult. 

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