The electrochemical approach to antioxidant activity assay of metal complexes with dipicolylamine ligand, containing 2,6-di-tert-butylphenol groups, based on electrochemical DPPH-test

Tyurin, V. Yu.; Moiseeva, Anna A.; Shpakovsky, D. B.; Милаева, Е. Р.

doi:10.1016/j.jelechem.2015.07.024

Cited by 25 publications

(16 citation statements)

References 56 publications

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“…This strategy of recording systematically DPPH signals on a rotating working electrode for different antioxidant concentrations was recently used by Tyurin et al. for the evaluation of antioxidant properties of metal complexes . This method is time consuming and does not allow real‐time monitoring of the reaction between DPPH and the antioxidant.…”

Section: Resultssupporting

confidence: 86%

“…Indeed, antioxidant properties can varied strongly depending on the nature of the solvent use for the analysis . Recently, acetonitrile was successfully used as solvent for the electrochemical evaluation of antioxidant properties of some metal complex, despite no systematic study was performed to show by mean of electrochemistry, the interactions between DPPH and the compounds tested …”

Section: Introductionmentioning

confidence: 95%

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Electrochemistry of 2,2‐Diphenyl‐1‐picrylhydrazyl (DPPH) in Acetonitrile in Presence of Ascorbic Acid ‐ Application for Antioxidant Properties Evaluation

et al. 2019

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The electrochemistry of 2,2-diphenyl-1-picrylhydrazyl (DPPH) in acetonitrile was studied in presence of ascorbic acid (AAH 2 ) as model antioxidant. In the presence of AAH 2 , the intensities of the two characteristic systems of DPPH decreases and an intense oxidation peak at 1.07 V assigned to the oxidation of reduced DPPH was observed. The currents associated to these electrochemical processes showed excellent correlation with the amount of AAH 2 added and were used for determining its free radicals scavenger activity. Chronoamperometry was found more suitable for a real time monitoring of the chemical reaction between DPPH and an antioxidant, and thus to evaluate their efficiencies by determining the corresponding half-maximal inhibitory concentration (IC 50 ) values. Comparison of the reactivity of the antioxidants tested was possible by comparing the times necessary for the stabilization of the residual DPPH reduction currents. The method was subsequently applied to the evaluation of antioxidant properties of lemon and orange samples.[a] Dr.

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Section: Resultssupporting

confidence: 86%

Section: Introductionmentioning

confidence: 95%

Electrochemistry of 2,2‐Diphenyl‐1‐picrylhydrazyl (DPPH) in Acetonitrile in Presence of Ascorbic Acid ‐ Application for Antioxidant Properties Evaluation

et al. 2019

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“…Nevertheless, 1a and 1b had mild activity to scavenge DPPH. This finding is also in accordance with a previous study revealing the close relationship between redox and antioxidant properties of the metal complexes[34].…”

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confidence: 94%

Palladium complexes of NO type Schiff bases: synthesis, characterization and antioxidant activities

Şenocak

Akbaş

2021

Cumhuriyet Science Journal

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The reaction of o-aminophenol with para hydroxy and methoxy substituted benzaldehydes yielded two Schiff bases. These Schiff bases functioning precursors were turned into palladium complexes by treating palladium acetate. The structural formulas based on spectral methods (elemental analysis, FT-IR spectroscopy, NMR spectroscopy and QTOF-LC/MS spectroscopy) were suggested for obtained both complexes. According to the structural characterization methods, one of the complexes had also an acetate co-ligand along with the hydroxy substituted Schiff base ligand. In the other complex, the palladium central ion was proposed to be coordinated with two methoxy substituted Schiff bases. Besides, DPPH scavenging activities of the all synthesized compounds were determined and compared to well-known antioxidant standards. According to the results, antioxidant activities of the palladium complexes was mild but lower than parent Schiff bases.

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“…Curiously, there are only a few assays that exploit electrochemical methods to investigate the reactivity of antioxidants with radicals. Several recent studies are reporting the development of modified electrodes to monitor the radical chain reactions [15–19]. Deutchoua et al.…”

Section: Introductionmentioning

confidence: 99%

Radical Scavenging Activity of Antioxidants by Cyclic Voltammetry

et al. 2020

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This work investigates the reactivity of individual antioxidants with the free radicals generated by 2,2′‐azobis(isobutironitrile) (AIBN). The consumption of antioxidants was followed by cyclic voltammetry. The fitting of such decay with a kinetic model yielded the rate constant of radical formation and the rate constant of radical inhibition exerted by each antioxidant. The antioxidant efficiency was defined as the ratio between and . The following ranking of antioxidants was obtained: α‐tocopherol≫catechin≫retinyl acetate≫hydroxytyrosol≫oleuropein≫caffeic acid. Overall, the approach shows the utility of cyclic voltammetry to investigate the kinetic rates at which antioxidants react with radicals.

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The electrochemical approach to antioxidant activity assay of metal complexes with dipicolylamine ligand, containing 2,6-di-tert-butylphenol groups, based on electrochemical DPPH-test

Cited by 25 publications

References 56 publications

Electrochemistry of 2,2‐Diphenyl‐1‐picrylhydrazyl (DPPH) in Acetonitrile in Presence of Ascorbic Acid ‐ Application for Antioxidant Properties Evaluation

Electrochemistry of 2,2‐Diphenyl‐1‐picrylhydrazyl (DPPH) in Acetonitrile in Presence of Ascorbic Acid ‐ Application for Antioxidant Properties Evaluation

Palladium complexes of NO type Schiff bases: synthesis, characterization and antioxidant activities

Radical Scavenging Activity of Antioxidants by Cyclic Voltammetry

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