Electrochemical Assembly of Ruthenium Complexes during the Multilayering Process of MnO₂

Abstract

Multilayered manganese dioxide (MnO 2 ) film intercalated with tris(2,2-bypyridine)ruthenium(II) ([Ru(bpy) 3 ] 2+ ) was synthesized by a one-step electrochemical method. The obtained film was characterized by FTIR, XRD, SEM and TEM techniques. FTIR and XRD measurements revealed that [Ru(bpy) 3 ] ions are intercalated in the interlayer between MnO 2 layers and exist as a two-layer form. After immersion in water, the two-layer form was changed into the one-layer. Electrochemistry of the resulting films in Na 2 SO 4 solution indicated an electron transfer from/to the underlying Pt substrate to/from the incorporated complexes through the MnO 2 sheets. At this situation, [Ru(bpy) 3 ] ions were extracted to maintain the charge neutrality of the film.