Electrochemical transformations and anti/prooxidant activity of sterically hindered o -benzoquinones
2017
The electrochemical properties of a series of sterically hindered o-benzoquinones in aprotic solvents were examined. The reaction of O2 and KO2 with o-benzoquinones and electrogenerated o-semiquinone radical anions was studied. The formation of o-semiquinone radical anions in the reactions of KO2 with the studied o-quinones was detected using UV-visible and ESR spectroscopy. The influence of the test compounds on lipid peroxidation was considered at the molecular and tissue levels in vitro. In the most cases, o-quinones exhibit antioxidant activity, which varies depending on the type of lipid substrate.
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