Alternating current conductivity of iron(III)-phthalocyanine grafted poly(N-vinylcarbazole)

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Abstract
Differences in alternating current conductivity measurements carried out on Fe(III)-phthalocyanine grafted poly(N-vinylcarbazole), compared to that of the fresh polymer, are attributed to both the linking chemical group involved and resonant structures developed. Polar and magnetic characteristics of the samples create capacitative and inductive behaviors. Frequency and temperature variations cause nonlinear electrical responses and enhanced conductivities up to 6 orders of magnitude, a.c. conductivity values, over 10−2 S m−1 obtained at discrete frequency and temperature values, are unusual responses of electrical measurements in vinylaromatic-based semiconducting polymer materials. Experiments using varying temperatures from room temperature to 200°C, gave conductivity peaks that are heating rate dependent. The bond flexibility of the link between the metal-phthalocyanine and polymer is of primary importance to the conduction behavior.