Temperature dependence of the electrical conductivity of fresh and irradiated tetrachloro-p-benzoquinone

Abstract

Temperature dependence of the electrical conductivity of fresh and irradiated ~ tetrachloro -p-bertzoquinorie (p-chloranil ) was carried out. The values of the thermal activation energies, as well as the electrical conductivities indicate that the fresh and irradiated p-chloranil behave like semiconductors. The electrical conductivities of p-chloranil as a function ofvoJtage ( at room temperature) are high in comparison with the unirradiated ones for 0.1 Mrad and 0.2 Mrad doses, while it is found to be less for 0.3 Mrad due to the damage in the molecular network of the solid crystal. The serniconducting character arises as a result of electron delocalization due to re-bond dissociation (C=O and C=C ) via radical anions formation of p-chloroanil.