Synthesis and electrochemistry of new thienyl - Schiff base complexes

The synthesis and characterization of nickel(II), copper(II), and vanadyl ({[}V=O](2+)) complexes of two new thienyl-substituted Schiff base ligands are reported. Cyclic voltammetry of some of these complexes showed oxidation waves, but none of the complexes formed conductive polymer films upon repeated cycling. UV-vis absorption spectroscopy shows that some of the complexes exhibit enhanced conjugation, and the radical cations formed on these chromophores appear to be too stable to undergo oxidative coupling.