INFIQC   05475
INSTITUTO DE INVESTIGACIONES EN FISICO- QUIMICA DE CORDOBA
Unidad Ejecutora - UE
artículos
Título:
Spontaneous adsorption of 3,5-Bis(3,5-dinitrobenzoylamino) benzoic acid onto carbon
Autor/es:
JULIETA I. PAEZ; MIRIAM C. STRUMIA; MARIO C. G. PASSEGGI JR.; JULIO FERRÓN; ANA B. BARUZZI; VERONICA BRUNETTI
Revista:
ELECTROCHIMICA ACTA
Editorial:
Elsevier
Referencias:
Año: 2009 p. 4192 - 4197
ISSN:
0013-4686
Resumen:
Dendritic molecules contain multifunctional groups that can be used to efficiently control the properties of an electrode surface. We are developing strategies to generate a highly functionalized surface using multifunctional and rigid dendrons immobilized onto different substrates. In the present work, we explore the immobilization of a dendritic molecule: 3,5-Bis (3,5-dinitrobenzoylamino) benzoic acid (D-NO2) onto carbon surfaces showing a simple and rapid way to produce conductive surfaces with electroactive chemical functions. The immobilized D-NO2 layer has been characterized using atomic force microscopy and cyclic voltammetry. D-NO2 adsorbs onto carbon surfaces spontaneously by dipping the electrode in dendron solutions. Reduction of this layer generates the hydroxylamine product. The resulting redox-active layer exhibits a well-behaved redox response for the adsorbed nitroso/hydroxylamine couple. The film permeability of derivatized surface has been analyzed employing the electrochemical response of redox probes: Ru(NH3)63+/Ru(NH3)62+ and Fe(CN)63-/Fe(CN)64-. Electrocatalytic oxidation of nicotinamide adenine dinucleotide onto a modified carbon surface was also observed.