ESR, electrochemical and ORAC studies of nitro compounds with potential antiprotozoal activity
Author
dc.contributor.author
Aravena, María C.
Author
dc.contributor.author
Figueroa, Roberto
Author
dc.contributor.author
Olea Azar, Claudio
Author
dc.contributor.author
Arán, Vicente J.
Admission date
dc.date.accessioned
2018-12-20T15:10:27Z
Available date
dc.date.available
2018-12-20T15:10:27Z
Publication date
dc.date.issued
2010
Cita de ítem
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Journal of the Chilean Chemical Society, Volumen 55, Issue 2, 2018, Pages 244-249
Identifier
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07179324
Identifier
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07179707
Identifier
dc.identifier.uri
https://repositorio.uchile.cl/handle/2250/158189
Abstract
dc.description.abstract
Cyclic Voltammetry (CV) and electron spin resonance (ESR) techniques were used in the investigation of several potentially antiprotozoal nitro derivatives of dihydroquinoxaline and indazole. A self-protonation process involving protonation of the nitro group due to the presence of an acidic proton in the structure of the nitro compound was observed in the first step of an ECErev reduction mechanism. ESR spectra of the free radicals obtained by electrochemical reduction in situ were characterized and analyzed. The ESR spectra showed three different hyperfine patterns for both families of compounds. In order to evaluate the free radical scavenger properties of these nitrocompounds we carried out ORAC-Fl (Oxygen Radical Antioxidant Capacity) assay. These derivatives showed a low antioxidant capacity.