On the Electrical Conductivity of Violanthrone, Iso-Violanthrone, and Pyranthrone

Abstract

Violanthrone, iso-violanthrone, and pyranthrone have electrical conductance to a certain degree. This is due to the molecular structure of these compounds, which are made of the network planes of carbon atoms, and to the assumption that the π-electron contribute to the electrical conduction. The electrical resistivity of violanthrone, iso-violanthrone, and pyranthrone was measured. The values at 15°C are as follows; 2.3×1010 ohm-cm, 5.7×109 ohm-cm, and 3.9×1015 ohm-cm respectively. The resistivity decreases with increasing temperature in every case, and a good linear relationships is observed between the logarithm of the resistivity and the reciprocal of the temperature. As the activation energy of the electrical conductance, the following values were observed; 0.39 ev, 0.375 ev, and 0.53 ev respectively. The values for violanthrone and iso-violanthrone suggest that they can be assumed to be intrinsic semi-conductors.