Spectral and cyclic voltammetry studies of chloro-salicyliden aniline and some of its complexes with Co(II) and Mn(II)

The qualitative information about the interaction between 2-{[p-chlorophenylimino]methyl}phenol as attracting chelating Schiff base ligand (HL) with cobalt(II) and manganese(II) ions have been discussed by using the data of spectroscopy (IR, UV-Visible) and 1H NMR resonance techniques. The electrochemical properties of these species have been carried out by using cyclic voltammetry studies to see the differences in the potential and activity behavior during and after the electron transfer process. The cyclic voltammetry behavior of ligand exhibited an irreversible one-electron transfer and redox diffusion-controlled process due to the linearity relationship between redox peaks current and square root of scan rates. The cyclic sweep for CoL and CoL2 complexes appeared two irreversible oxidation peaks but with different values and positions, while the cyclic sweep of MnL and MnL2 complexes appeared several redox peaks, which related to the formation of various manganese redox species. All complexes had a deviation of current and potential to more anodic values when the cyclic sweep was applied at different scan rates. A positive shift was observed for CoL2 and MnL2 complexes may be to the electron-donating and electron-withdrawing properties of phenyl substituted group.