Electron transfer at Au surfaces modified by Tethered Osmium bipyridine-pyridine complexes

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Chemically modified electrodes by the osmium complex [Os(bpy) 2Clpy - X] + PF - 6 tethered to Au surfaces by (1) reaction of cysteamine with the aldehyde (X=CHO), (2) mercapto alkanoic acid reaction with amine [X= (CH 2) 2NH 2], and (3) reduction of the diazonium salt of paminobenzoic acid and furth...

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Detalles Bibliográficos
Autores principales: Ricci, A., Rolli, C., Rothacher, S., Baraldo, L., Bonazzola, C., Calvo, E.J., Tognalli, N., Fainstein, A.
Formato: JOUR
Materias:
Charge transfer
Diazonium
FTIR-RAS
Osmium bipyridil
Resonant Raman
SAM
Thiol
Amine derivatives
Chemically modified electrodes
Cysteamine
Electron transfer
Absorption spectroscopy
Aldehydes
Amines
Electron transitions
Gold
Osmium compounds
Pyridine
Raman spectroscopy
Surfaces
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_14328488_v11_n11_p1511_Ricci
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:Chemically modified electrodes by the osmium complex [Os(bpy) 2Clpy - X] + PF - 6 tethered to Au surfaces by (1) reaction of cysteamine with the aldehyde (X=CHO), (2) mercapto alkanoic acid reaction with amine [X= (CH 2) 2NH 2], and (3) reduction of the diazonium salt of paminobenzoic acid and further amidation reaction with the amine derivative of the osmium complex [X=(CH 2) 2NH 2] were performed to explore the electron transfer properties of these redox-modified surfaces. The modified Au surfaces were characterized by infrared reflection absorption spectroscopy and resonant Raman spectroscopy. Cyclic voltammetry was used to study the electrochemical properties of the osmium complexes covalently attached to the surface as a function of the type and length of the tether. © 2007 Springer-Verlag.

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