Electrochemistry of Os(2,2´-bpy)2ClPyCH2NHCOPh tethered to Au electrodes by S-Au and C-Au junctions

A. RICCI; N. TOGNALLI; E. DE LA LLAVE; C. VERICAT; L. MÉNDEZ DE LEO; F. J. WILLIAMS; D. SCHERLIS; R. SALVAREZZA; E. J. CALVO

PHYSICAL CHEMISTRY CHEMICAL PHYSICS

ROYAL SOC CHEMISTRY

Lugar: london; Año: 2011 vol. 13 p. 5336 - 5345

1463-9076

Osmium pyridine-bipyridine redox centers have been tethered to Au electrodes by chemical modification through Au–S and Au–C bonds respectively. 4-mercapto benzoic acid and the reduction product of the aryl diazonium salt of 4-amino benzoic acid were reacted on Au surfaces, with further post-functionalization by chemical reaction of the osmium complex amino-pyridine derivative with the surface carboxylates. The resulting modified Au surfaces were characterized by polarization modulated infrared reflection absorption spectroscopy (PM-IRRAS), scanning tunneling microscopy (STM), X-ray photoelectron spectroscopy(XPS), resonant raman spectroscopy and cyclic voltammetry.