Voltammetric behavior of 3,5-dinitrobenzoic acid in solution on GCE and encapsulated on multiwalled carbon nanotube modified electrode
Author
dc.contributor.author
Moscoso Cabello, Raúl Andrés
Author
dc.contributor.author
Carbajo, J.
Author
dc.contributor.author
Mozo, J. D.
Author
dc.contributor.author
Squella Serrano, Juan
Admission date
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2016-10-25T20:11:25Z
Available date
dc.date.available
2016-10-25T20:11:25Z
Publication date
dc.date.issued
2016
Cita de ítem
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Journal of Electroanalytical Chemistry 765 (2016) 149–154
es_ES
Identifier
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10.1016/j.jelechem.2015.08.010
Identifier
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https://repositorio.uchile.cl/handle/2250/140972
Abstract
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The cyclic voltammetric behavior of 3,5-dinitrobenzoic acid (3,5-DNB) in 0.1 M PBS of pH 7 was examined at a glassy carbon electrode (GCE). 3,5 -DNB was found to produce two irreversible reduction peaks corresponding to the reduction of each nitro group in the 3,5 -DNB molecule. Our results contradict previous studies (P. Gopal et al. Journal of Molecular Liquids 178 (2013) 168-174) wherein the same peaks are assigned as, the first, to the reduction of the nitro group to hydroxylamine and the second, to the subsequent reduction to amine derivative.
Also we report that GCE modified with multiwalled carbon nanotubes (MWCNTs) can be derivatized with 3,5 DNB. The derivatization procedure involves simple immersion of the MWCNT-modified electrode in a solution containing 3,5 -DNB.
SEM images reveal that the network of nanotubes form a homogeneous, twisted, densely packed, three-dimensional array that remains attached to the GCE surface. Both electrochemical and SEM measurements indicate that 3,5-DNB is encapsulated on the electrode, most probably by being trapped within the pockets of the mentioned three-dimensional array, without formation of covalent bonding.