Abstract
The electrochemical mechanism of redox and stability of myricetin were investigated using cyclic voltammetry and electronic absorption spectra.Two oxidation reactions and two reduction reactions were achieved in B-R buffer solution.The oxidation reactions were both due to oxidation of 4′-OH on ring B and 3-OH on ring C within a one electron one proton process.The reduction reactions both correspond to the transformation of 4-carbonyl group on ring C to intermediate radical,and intermediate radical to hydroxyl group within a one electron one proton process,respectively.The redox of myricetin is pH dependent because of deprotonation,resulting in an increase of the antioxidant ability upon formation of the deprotonated forms.The final oxidation product of myricetin without electroactivity adsorbs on the electrode surface,and blocks transfers of electron.With increase of pH(7.45~12.00),Ⅰand Ⅱ bonds of electronic absorption spectra of myricetin are red-shifted due to the deprotonation and the degradation of myricetin increases.The time of storage affects intensity of degradation of myricetin.
Keywords
myricetin, electrochemistry, pH, electronic absorption spectra
Publication Date
2007-08-28
Online Available Date
2007-08-28
Revised Date
2007-08-28
Received Date
2007-08-28
Recommended Citation
Dong-mei WU, Shuang LIU, Hong-fu GAO, Jin-lian LI, Hai-yan LIU, Qi-chao LIANG.
Investigation on the Electrochemical and Spectra Properties of Myricetin[J]. Journal of Electrochemistry,
2007
,
13(3): 258-263.
DOI: 10.61558/2993-074X.1818
Available at:
https://jelectrochem.xmu.edu.cn/journal/vol13/iss3/6
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