Electrochemical Characterization of a Novel Salen-Type Modified Electrode

• DOI: 10.1021/jp982160r
• Publication Date: 2002-07-26T05:28:13Z
• Authors: M. Vilas-Boas; C. Freire; B. de Castro; A. R. Hillman
• Keywords: Chronoamperometry; Horizontal scan rate

The nickel(II) complex with H2saltMe, a N2O2 Schiff base ligand derived from salicylaldehyde, was oxidatively electropolymerized on Pt electrodes in CH3CN/0.1 mol dm-3 tetraethylammonium perchlorate (TEAP) to generate polymer films that exhibit reversible oxidative electrochemical behavior wide potential range (0.0−1.3 V), high conductivity, and stability/durability. of poly[Ni(saltMe)] can be made the three regimes charge transport by manipulation film thickness experimental time scale. Films prepared small number cycles show thin-layer/surface-type cyclic voltammetry scan rate used. Thicker polymers changeover this thin-layer regime diffusion control at critical depends thickness. In chronoamperometry experiments transition semiinfinite finite conditions observed longer times following step.Values D1/2C for second stage oxidation redox obtained both techniques were good agreement. A comparison values reductive reactions suggests ingress counterions solvent swelling must occur predominantly up 0.8V positive going scan.