THE BEHAVIOR OF A BENZOQUINONE HYDROQUINONE REDOX COUPLE AT A POLYPHENYLENEDIAMINE-COATED ELECTRODE

The electrode behavior of a ladder redox polymer, poly-o-phenylenediam ine (PPD), in an electrochemical reaction that involved solute electro active species (p-benzoquinone or hydroquinone) was investigated at a PPD-coated gold electrode by using rotating disk electrode and cyclic voltammetry techniques. The electrode behavior of PPD was compared wit h the behavior of its closest electronically conducting analog, polyan iline. The distinctions in their electrode behavior are discussed in t erms of the theoretical concepts of the potential drop distribution at the metal/polymer/electrolyte solution interfaces.