ADSORPTION OF MONOLAYERS OF P2MO18O626- AND DEPOSITION OF MULTIPLE LAYERS OF OS(BPY)(3)(2-P2MO18O626- ON ELECTRODE SURFACES())

The unusually strong, irreversible adsorption of monolayer quantities of the P2Mo18O626- anion on glassy carbon, highly ordered pyrolytic gr aphite, indium tin oxide, and gold-coated quartz electrodes was examin ed by electrochemical, spectroelectrochemical, and quartz crystal micr ogravimetric techniques. A very simple method was developed to deposit multiple layers of composites consisting of alternating layers of the P2Mo18O626- anion and large, multiply-charged cations such as Os(bpy) (3)(2+). The resulting deposit is stable and exhibits electroactivity from both of the components that reflects the structure and ionic cond uctivity of the solid multilayer.