“…Many of these dyes have been widely investigated as adsorbates at graphite and glassy carbon electrodes for the electrocatalytic oxidation of the coenzyme NAD(P)H (12)(13)(14)(15)(16). Some of them were electropolymerized on electrodes, e.g., thionine (17)(18)(19), methylene blue (20), and some other azines (21)(22)(23)(24)(25), and showed electrocatalytic properties for anodic oxidation of NADH (26).…”