Silicon-based ferrocenyl dendrimers as anion receptors in solution and immobilized onto electrode surfaces

Abstract

Abstract Electrochemical investigations showed that a new silicon-based ferrocenyl dendrimer receptor, containing Si–NH groups, recognises and senses anionic guest species via significant cathodic perturbations of the oxidation potential of the ferrocene couple. This dendrimer exhibits HSO 4 − and H 2 PO 4 − selective preferences. The presence of Si–NH groups in the dendrimer plays a significant role in the electrochemical recognition of anions. Electrodes modified with this ferrocenyl dendrimer are also sensitive to the presence and concentration of anions.