RT Journal Article
T1 Elucidation of the Electrochemical Oxidation Mechanism of the Antioxidant Sesamol on a Glassy Carbon Electrode
A1 Estévez Brito, Rafael
A1 Rodríguez Mellado, José Miguel
A1 Maldonado, Pilar
A1 Ruiz Montoya, Mercedes
A1 Palma López, Alberto
A1 Morales Carrillo de Albornoz, Emilio
AB The dissociation constant of Sesamol (5-hydroxy-1,3-benzodioxol) was determined from the dependence of the UV-visible spectra with the medium acidity. A pK value of 10.1 ± 0.1, corresponding to the hydroxyl group, was obtained. The oxidation of sesamol was investigated on carbon electrodes using controlled-potential electrolysis, linear-sweep cyclic voltammetry and measurements at the foot of the first oxidation peak. Up to three oxidation peaks and one reduction peak were found. The dioxol ring of the dissociated sesamol undergoes a cleavage to give 3-substituted 1,4-benzoquinone, being the rate-determining step the second electron transfer. The formation of radicals in the ring cleavage explains in part the ability of sesamol to interact with reactive oxygen species (ROS).
PB The Electrochemical Society
SN 0013-4651
SN 1945-7111 (electrónico)
YR 2014
FD 2014-03-13
LK https://hdl.handle.net/10272/23349
UL https://hdl.handle.net/10272/23349
LA eng
NO Estévez Brito, R., Rodríguez Mellado, J. M., Maldonado, P., Montoya, M. R., Palma, A., & Morales, E. (2014). Elucidation of the Electrochemical Oxidation Mechanism of the Antioxidant Sesamol on a Glassy Carbon Electrode. In Journal of The Electrochemical Society (Vol. 161, Issue 5, pp. G27–G32). The Electrochemical Society. https://doi.org/10.1149/2.028405jes
NO Financial support from Junta de Andalucía  (Research Groups FQM-0198, RNM-371 and FQM-0348) is gratefully acknowledged.
DS Repositorio Institucional de la Universidad de Huelva
RD 30 may 2026