title: Electrochemistry of Os(2,2'-bpy)2ClPyCH2NHCOPh tethered to Au electrodes by S-Au and C-Au junctions.
abstract: 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.
authors.affiliation: INQUIMAE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, CONICET Pabellón 2, Ciudad Universitaria, 1428 Buenos Aires, Argentina.
authors.forename: A M
authors.initials: AM
authors.lastname: Ricci
authors.forename: N
authors.initials: N
authors.lastname: Tognalli
authors.forename: E
authors.initials: E
authors.lastname: de la Llave
authors.forename: C
authors.initials: C
authors.lastname: Vericat
authors.forename: Lucila P
authors.initials: LP
authors.lastname: Méndez De Leo
authors.forename: Federico J
authors.initials: FJ
authors.lastname: Williams
authors.forename: D
authors.initials: D
authors.lastname: Scherlis
authors.forename: R
authors.initials: R
authors.lastname: Salvarezza
authors.forename: E J
authors.initials: EJ
authors.lastname: Calvo
mesh_terms: D010129:4-Aminobenzoic Acid / Q000737:chemistry; D004563:Electrochemistry; D004566:Electrodes; D006046:Gold / Q000737:chemistry*; D016252:Microscopy, Scanning Tunneling; D015394:Molecular Structure; D009992:Osmium / Q000737:chemistry*; D010084:Oxidation-Reduction; D056951:Photoelectron Spectroscopy; D011725:Pyridines / Q000737:chemistry*; D013059:Spectrum Analysis, Raman; D013499:Surface Properties
chemical_list: D011725:Pyridines; D009992:Osmium; D006046:Gold; C023666:pyridine; D010129:4-Aminobenzoic Acid