Electrochemical Studies of Glutathione Monolayer Assembled on A Polycrystalline Gold Electrode

摘要

The glutathione (GSH) monolayer and complex monolayer of GSH-metallic ion on polycrystalline gold electrode were studied by using K 3Fe(CN) 6 as the redox probe. As for the GSH monolayer, it was found that the metallic ions could open the ion-gate in the monolayer dramatically in the order La 3+> Pb 2+>> Ba 2+> Ca 2+ whereas Zn 2+ ion closed the ion-gate. The complexes of GSH-metallic ions were capable of self-assembling the different kind of monolayer. All the differences were related to the structural configuration of the anchored GSH molecule, which changed with the different metallic ions or pH.