Electrooxidation of flavonoids at platinum electrode studied by cyclic voltammetry

Masek, Anna; Zaborski, Marian; Chrześcijańska, Ewa

doi:10.1016/j.foodchem.2010.12.127

Cited by 82 publications

(35 citation statements)

References 23 publications

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“…This limitation did not allow to investigate the influence of the 2,3-diphenylxanthone motif in the electrochemical behavior of the studied xanthones XH2-XH9. Masek et al 15 performed the cyclic voltammogram of the parent xanthone at 1 mM and detected three oxidation peaks. In that study, the cyclic voltammogram of the parent flavone at 1 mM showed two oxidation peaks with higher potential values.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical characterization of bioactive hydroxyxanthones by cyclic voltammetry

Santos

Garcia

Silva

et al. 2013

Tetrahedron Letters

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a b s t r a c tThe present study reports the electrochemical behavior of several phenolic and catecholic-substituted 2,3-diarylxanthones on a glassy carbon electrode, challenged by cyclic voltammetry at different pH values (4.0, 7.4, and 11.0). Higher pH values required lower anodic and cathodic peak voltages. The oxidation of catecholic groups occurred at lower peak potentials in a reversible and pH dependent manner. Anodic peak potentials appeared at higher pH values and were attributed to the electrochemically irreversible oxidation of the phenolic groups. The number and position of hydroxyl substituents were the determinants for the electrochemical behavior and found to correlate with the scavenging activity for reactive oxygen (ROS) and nitrogen species (RNS). A xanthone with two catechol units presented the lowest anodic potential voltage (E pa = 0.15 V) and proved to be the most effective ROS and RNS scavenger.

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Section: Introductionmentioning

confidence: 99%

Electrochemical characterization of bioactive hydroxyxanthones by cyclic voltammetry

Santos

Garcia

Silva

et al. 2013

Tetrahedron Letters

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“…It was found that this oxidation reaction depends on both pH and concentration value, and that its mechanism involved a two-electron-twoproton transfer [91]. The authors [91] stated that difficult to oxidize hydroxyl groups at C and A rings of the flavonoid molecule are likely to be oxidized at higher potentials, proving consistency with the results of CV studies [72,73], and this could be the cause of the second peak occurrence at 0.750 V on the voltammogram of catechin.…”

Section: Differential Pulse Voltammetrymentioning

confidence: 72%

“…This aspect was consistent with an electro-oxidation mechanism involving the transfer of one or two electrons, as dependent on the number of hydroxyl groups present in B ring. The hydroxyl groups in the rings A and C were oxidized at higher potentials, with further peaks generated [72].…”

Section: Cyclic Voltammetrymentioning

confidence: 99%

Electrochemical Methods for Total Antioxidant Capacity and its Main Contributors Determination: A review

2015

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Abstract:Backround: The present review focuses on electrochemical methods for antioxidant capacity and its main contributors assessment. The main reactive oxygen species, responsible for low density lipoprotein oxidation, and their reactivity are reminded. The role of antioxidants in counteracting the factors leading to oxidative stress-related degenerative diseases occurence, is then discussed. Antioxidants can scavenge free radicals, can chelate pro-oxidative metal ions, or quench singlet oxygen. When endogenous factors (uric acid, bilirubin, albumin, metallothioneins, superoxide dismutase, catalase, glutathione peroxidase, glutathione reductase, glutathione-

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“…All the extracts obtained were evaluated for their antioxidant activity by using cyclic voltammetry method as described by Masek et al 14 . The most active extract was selected to further fractionate with MPLC analysis.…”

Section: Antioxidant Assaymentioning

confidence: 99%

“…Using an electroanalytical approach for detection of their antioxidant activity is rare 13 . Electrochemical procedures represent advantageous possibility to measure a reduction and oxidation processes in organic compounds that can be helpful in how these compounds are metabolised by living organisms 14 . Recently, Keffous et al reported the antioxidant activity of Limoniastrum feei aqueous extract by using cyclic voltammetry method.…”

Section: Introductionmentioning

confidence: 99%

Antioxidant Assay Guided Separation of the Methanol Stem Fraction of Binahong (Anredera Cordifolia) using Cyclic Voltammetry Method

Rasyidi¹,

Andi²

2017

Orient. J. Chem

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The aim of this study was to identify and characterize groups of antioxidant active naturally from methanol extract of the stem of Anredera cordifolia through antioxidant assay-guided separation. The methanol extract (ME) displayed the highest antioxidant activity, compared to ethyl acetate extract (EE) and hexane extract (HE) using cyclic voltammetry method. Ascorbic acid was used as a positive control in this research. The repeated fractionation of active ME by MPLC and HPLC analyses yielded a constituent with strong antioxidant property. The active constituent (RNV-1) was predicted as a flavonoid type based on the UV spectrum data. The antioxidant activity results exhibited that RNV-1 had a coefficient of antioxidant activity (K) sligtly higher than K of ascorbic acid with the values of 0.055 and 0.052 respectively. It was found that RNV-1 demonstrated an excellent antioxidant activity in comparison with the standard antioxidant activity through antioxidant assays-guided separation. The results obtained suggested that the stem of A. cordifolia can be used potentially as a source of natural antioxidants by contributing beneficial health effects.

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Electrooxidation of flavonoids at platinum electrode studied by cyclic voltammetry

Cited by 82 publications

References 23 publications

Electrochemical characterization of bioactive hydroxyxanthones by cyclic voltammetry

Electrochemical characterization of bioactive hydroxyxanthones by cyclic voltammetry

Electrochemical Methods for Total Antioxidant Capacity and its Main Contributors Determination: A review

Antioxidant Assay Guided Separation of the Methanol Stem Fraction of Binahong (Anredera Cordifolia) using Cyclic Voltammetry Method

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