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Two oxidation pathways of bioactive flavonol rhamnazin under ambient conditions
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SYSNO ASEP 0428563 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Two oxidation pathways of bioactive flavonol rhamnazin under ambient conditions Author(s) Ramešová, Šárka (UFCH-W) RID
Degano, I. (IT)
Sokolová, Romana (UFCH-W) RID, ORCID, SAISource Title Electrochimica acta. - : Elsevier - ISSN 0013-4686
Roč. 133, JUL 2014 (2014), s. 359-363Number of pages 5 s. Language eng - English Country GB - United Kingdom Keywords oxidation ; flavonoids ; rhamnazin Subject RIV CG - Electrochemistry Institutional support UFCH-W - RVO:61388955 UT WOS 000337985800045 EID SCOPUS 84899891708 DOI https://doi.org/10.1016/j.electacta.2014.04.074 Annotation Two pathways of the oxidation mechanism of rhamnazin under ambient conditions are proposed. The redox potential of rhamnazin strongly depends on the presence of dissociation forms in solution. In situ spectroelectrochemistry and identification of degradation products by HPLC-DAD and HPLC–ESI-MS/MS confirmed the presence of fast subsequent chemical reactions following the electron transfer. As demonstrated, strict anaerobic conditions have to be preserved in studies of antioxidant properties and of its pharmacological efficiency. In the absence of oxygen, 2,4-dihydroxy-2-(4 -hydroxy-3 -methoxybenzoyl)- 6-methoxy-benzofuran-3(2H)-one was identified as the only oxidation product. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2015
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