ELECTROPOLYMERIZATION OF FERROCENE BIS-AMIDE DERIVATIVES - A POSSIBLEROUTE TO AN ELECTROCHEMICAL SENSORY DEVICE

The electrochemical behaviour of ferrocene bis-amide derivatives in th e presence and in the absence of an alkali metal cation is described. Voltammetric studies confirm the selective complexation ability of the se compounds towards Li+ among the alkali metal cations. Platinum and glassy carbon electrodes have been modified by electropolymerization o f pyrrole-substituted ferrocene bis-amide derivatives. The influence o f the alkali metal cation on both the electropolymerization step and o n the redox behaviour of the resulting films has been studied, The for mation of a complex between polymerizable ferrocene bis-amide derivati ves and Li+ leads to an increase in the deposition efficiency. In aque ous media, the redox potential of the electroactive film depends on th e nature and the concentration of the counter-anion of the electrolyte .