Abstract
The electrical conductivity properties of the Schiff bases derived from reaction of 2-methylbenzopyrrole-3-carboxaldehyde with some aniline derivatives, and their metal complexes, were studied. It has been concluded that the metal complexes have slight semiconducting behaviour. Their conductivity and activation energy were found to depend on molecular structure as well as the ionic radii of the metal ions. The mechanism of conduction was also investigated. In addition, the current-voltage dependence of the metal-free ligands and of some metal complexes was studied. This indicates that the metal-free ligands have ohmic conduction which is temperature-independent. However, the metal complexes were found to vary from ohmic and/or space charge limiting current conduction over the different ranges of applied voltage.
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