Original scientific paper

The Process of Electrooxidation of Quercetin 3,4'-di-O-β-Glucopyranoside at Glassy Carbon Electrode

Boguslaw Pierozynski ; Department of Chemistry, Faculty of Environmental Management and Agriculture, University of Warmia and Mazury in Olsztyn, Plac Lodzki 4, 10-727 Olsztyn, Poland
Danuta Zielinska ; Department of Chemistry, Faculty of Environmental Management and Agriculture, University of Warmia and Mazury in Olsztyn, Plac Lodzki 4, 10-727 Olsztyn, Poland

Abstract

The present paper reports electrochemical and UV-VIS spectroscopic studies on the process of electrooxidation of quercetin 3,4'-di-O-β-glucopyranoside (Q 3,4'-diglc) molecule, at glassy carbon electrode
surface in 0.1 M sodium acetate – acetic acid buffer in 90 % methanol solution. The process starts at 3'-OH group (ring B), followed by oxidation of 5,7-dihydroxyl group in ring A. As a result of electrochemical reactions, the surface area of glassy carbon (GC) electrode becomes extensively blocked by Q 3,4'-diglc oxidation products.

Keywords

Q 3; 4'-diglc electrooxidation; cyclic voltammetry; impedance spectroscopy; UV-VIS spectroscopy

Hrčak ID:

56015

URI

https://hrcak.srce.hr/56015

Publication date:

15.7.2010.

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