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Ferreira, F.D.R.; Da Silva, E.G.; De Leo, L.P.M.; Calvo, E.J.; Bento, E.D.S.; Goulart, M.O.F.; De Abreu, F.C. "Electrochemical investigations into host-guest interactions of a natural antioxidant compound with β-cyclodextrin" (2010) Electrochimica Acta. 56(2):797-803
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Abstract:

The electrochemical behavior of mangiferin (MGN), a natural antioxidant compound, is examined using cyclic and differential pulse voltammetry in a protic medium on a glassy carbon electrode. The voltammograms exhibit a single irreversible pH-dependent anodic wave with current controlled by adsorption. Complexes of MGN with β-cyclodextrin (β-CD) were prepared and their formation was confirmed by UV-vis spectroscopy and electrochemical experiments, using a self-assembled monolayer of cyclodextrin on a gold electrode. The association constant of MGN:β-CD complexes was estimated by the Benesi-Hildebrand method, based on the spectrophotometric quantification of free β-CD and by the direct method using cyclic voltammetry and the Langmuir isotherm. PM IRRAS experiments corroborated the inclusion process based on the observation of the corresponding peaks in the spectra of the samples. MGN was quantified using a simple electrochemical method based on a β-CD incorporated carbon nanotube (CNT)-modified electrode (β-CDCNT). The presence of β-CD led to a 10-fold lower detection limit than that obtained with a CNT-modified electrode. © 2010 Elsevier Ltd. All rights reserved.

Registro:

Documento: Artículo
Título:Electrochemical investigations into host-guest interactions of a natural antioxidant compound with β-cyclodextrin
Autor:Ferreira, F.D.R.; Da Silva, E.G.; De Leo, L.P.M.; Calvo, E.J.; Bento, E.D.S.; Goulart, M.O.F.; De Abreu, F.C.
Filiación:Instituto de Química e Biotecnologia, Universidade Federal de Alagoas, UFAL, Av A C Simoes Tabuleiro dos Martins, 57072-970 Maceió, Alagoas, Brazil
INQUIMAE, Departamento de Química Inorgánica, Universidad de Buenos Aires, Argentina
Palabras clave:β-Cyclodextrin; Apparent formation constant; Carbon-nanotube modified electrodes; Mangiferin; PM IRRAS; Anodic waves; Association constant; Benesi-Hildebrand; Cd complex; Current-controlled; Differential pulse voltammetry; Direct method; Electrochemical behaviors; Electrochemical experiments; Electrochemical investigations; ELectrochemical methods; Formation constants; Glassy carbon electrodes; Gold electrodes; Host guest interactions; Langmuir isotherm; Lower detection limit; Mangiferin; Modified electrodes; Natural antioxidants; PH-dependent; PM-IRRAS; UV-vis spectroscopy; Voltammograms; Adsorption; Carbon nanotubes; Complexation; Drug interactions; Electrodes; Glass membrane electrodes; Glassy carbon; Gold compounds; Self assembled monolayers; Ultraviolet spectroscopy; Cyclic voltammetry
Año:2010
Volumen:56
Número:2
Página de inicio:797
Página de fin:803
DOI: http://dx.doi.org/10.1016/j.electacta.2010.09.066
Título revista:Electrochimica Acta
Título revista abreviado:Electrochim Acta
ISSN:00134686
CODEN:ELCAA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00134686_v56_n2_p797_Ferreira

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Citas:

---------- APA ----------
Ferreira, F.D.R., Da Silva, E.G., De Leo, L.P.M., Calvo, E.J., Bento, E.D.S., Goulart, M.O.F. & De Abreu, F.C. (2010) . Electrochemical investigations into host-guest interactions of a natural antioxidant compound with β-cyclodextrin. Electrochimica Acta, 56(2), 797-803.
http://dx.doi.org/10.1016/j.electacta.2010.09.066
---------- CHICAGO ----------
Ferreira, F.D.R., Da Silva, E.G., De Leo, L.P.M., Calvo, E.J., Bento, E.D.S., Goulart, M.O.F., et al. "Electrochemical investigations into host-guest interactions of a natural antioxidant compound with β-cyclodextrin" . Electrochimica Acta 56, no. 2 (2010) : 797-803.
http://dx.doi.org/10.1016/j.electacta.2010.09.066
---------- MLA ----------
Ferreira, F.D.R., Da Silva, E.G., De Leo, L.P.M., Calvo, E.J., Bento, E.D.S., Goulart, M.O.F., et al. "Electrochemical investigations into host-guest interactions of a natural antioxidant compound with β-cyclodextrin" . Electrochimica Acta, vol. 56, no. 2, 2010, pp. 797-803.
http://dx.doi.org/10.1016/j.electacta.2010.09.066
---------- VANCOUVER ----------
Ferreira, F.D.R., Da Silva, E.G., De Leo, L.P.M., Calvo, E.J., Bento, E.D.S., Goulart, M.O.F., et al. Electrochemical investigations into host-guest interactions of a natural antioxidant compound with β-cyclodextrin. Electrochim Acta. 2010;56(2):797-803.
http://dx.doi.org/10.1016/j.electacta.2010.09.066