Charge-Transfer Rates in Thin Polyelectrolyte Films Incorporating a Redox Molecule with Two Separate Electroactive Centers Having Different Redox Potentials. An Alizarine Red S–Cationic Perfluoropolymer Film System

摘要: The diffusion coefficients for the charge-transport processes through 9,10-dihydro-3,4-dihydroxy-9,10-dioxo-2-anthracenesulfonate (Alizarine Red S, 1)-incorporating cationic perfluoropolymer (CPFP) polyelectrolyte films on electrodes undergoing oxidation or reduction of two separate electroactive centers with different redox potentials, i.e., two-electron 1 to 3,4,9,10-tetrahydroxy-2-anthracenesulfonate (2) and oxidations 2 3,4,9,10-tetrahydro-3,4,9,10-tetraoxo-2-anthracenesulfonate ( 3) were measured by potential-step chronoamperometry chronocoulometry. apparent 2, 1, 3 where first are reversible process is irreversible, represented as Dapprev(1→2), Dapprev(2→1) Dappirrrev (1→3), respectively, decreased increasing concentration (Cfilm) (or 2) in CPFP film, a given Cfilm they found be following order: Ds′>>Dapprev (...