RESUMO

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.

Assuntos

Ouro/química , Osmio/química , Piridinas/química , Ácido 4-Aminobenzoico/química , Eletroquímica , Eletrodos , Microscopia de Tunelamento , Estrutura Molecular , Oxirredução , Espectroscopia Fotoeletrônica , Análise Espectral Raman , Propriedades de Superfície