Note on the voltammetry of ferrocene carboxylate in aqueous solution

Cyclic voltammetry of ferrocene dicarboxylate in aqueous solutions at high pH, in the presence of oxygen, showed evidence of an EC' mechanism where th e oxidised form of ferrocene dicarboxylate reacts with HO2- which had been produced at a lower potential. However, an analogous experiment with ferroc ene carboxylate yielded a cyclic voltammogram with a post peak following th e anodic peak for ferrocene carboxylate. The reason for the post peak is no t clear but may be due to a delay in the reaction between the oxidised form of ferrocene carboxylate and HO2-. (C) 1999 Elsevier Science S.A. All righ ts reserved.