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

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-function...

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Published inPhysical chemistry chemical physics : PCCP Vol. 13; no. 12; pp. 5336 - 5345
Main Authors Ricci, A M, Tognalli, N, de la Llave, E, Vericat, C, Méndez De Leo, Lucila P, Williams, Federico J, Scherlis, D, Salvarezza, R, Calvo, E J
Format Journal Article
LanguageEnglish
Published England 28.03.2011
Subjects
4-Aminobenzoic Acid - chemistry
Benzoic acid
Derivatives
Electrochemistry
Electrodes
Gold
Gold - chemistry
Microscopy, Scanning Tunneling
Molecular Structure
Osmium
Osmium - chemistry
Oxidation-Reduction
Photoelectron Spectroscopy
Pyridines - chemistry
Scanning tunneling microscopy
Spectrum Analysis, Raman
Surface chemistry
Surface Properties
X-ray photoelectron spectroscopy
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Summary: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.
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ISSN:1463-9076
1463-9084
DOI:10.1039/c0cp02409k