Photoresponsive graphite electrode coated with bilayer membranes of prussian blue and polymer-pendant Ru(bpy) 2+3

Abstract

Graphite electrode was made photoresponsive by coating with bilayer membranes of Prussian blue (PB) and polymer-pendant Ru(bpy) 2+ 3. Photocurrent was induced by irradiating the coated electrode which was dipped in aqueous electrolyte. The photocurrent was dependent on the applied potential. Action spectra showed that the major process of the photocurrent generation concerns the excitation of the Ru complex, and the role of PB as electron mediator was strongly suggested. The minor process for the photocurrent generation concerns the excitation of PB and the following electron transfer between the excited PB and the electrode.