Spontaneous adsorption of 3,5-Bis(3,5-dinitrobenzoylamino) benzoic acid onto carbon

JULIETA I. PAEZ; MIRIAM C. STRUMIA; MARIO C. G. PASSEGGI JR.; JULIO FERRÓN; ANA B. BARUZZI; VERONICA BRUNETTI*

Elsevier

Año: 2009 vol. 54 p. 4192 - 4192

p style="MARGIN: 0cm 0cm 0pt" class="BDAbstract">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/hydro