title: Magnetic field effects on electric behavior of [Fe(CN)6]3-at bare and membrane-coated electrodes.
abstract: The cyclic voltammetric behavior of [Fe(CN)6]3-was investigated under homogeneous magnetic fields perpendicular to the electrode surface in order to determine the effects of magnetic fields on the distribution of an Fe2+/Fe3+redox couple. The cathodic current was enhanced much more than the anodic current by a homogeneous magnetic field, suggesting that the concentration gradient of paramagnetic [Fe(CN)6]3-and diamagnetic [Fe(CN)6]4-formed at an electrode surface may also contribute to the asymmetric current. The apparent diffusion coefficient of the redox couple increased by over 30% in both cathodic and anodic processes upon applying a magnetic field. For a gold electrode coated with dioctadecyldimethylammonium, the application of a magnetic field perpendicular to the surface increased the peak-to-peak separation, and enhanced the asymmetric current. It is inferred that the application of a magnetic field promotes the electron-tunneling process by tilting chain molecules in the barrier membrane.
authors.affiliation: Department of Chemistry, Faculty of Science, Shinshu University, 3-1-1 Asahi, Matsumoto, Nagano 390-8621, Japan.
authors.forename: Govindachetty
authors.initials: G
authors.lastname: Saravanan
authors.affiliation: Department of Chemistry, Faculty of Science, Shinshu University, 3-1-1 Asahi, Matsumoto, Nagano 390-8621, Japan.
authors.forename: Katsuhiko
authors.initials: K
authors.lastname: Fujio
authors.affiliation: Department of Chemistry, Faculty of Science, Shinshu University, 3-1-1 Asahi, Matsumoto, Nagano 390-8621, Japan.
authors.forename: Sumio
authors.initials: S
authors.lastname: Ozeki
keywords: [Fe(CN)6]3−; apparent diffusion coefficient; dioctadecyldimethylammonium chloride; electron-tunneling reaction; homogeneous magnetic field