About: The oxidation mechanism of the antioxidant quercetin in nonaqueous media

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About: The oxidation mechanism of the antioxidant quercetin in nonaqueous media Goto Sponge NotDistinct Permalink

An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

Attributes	Values
rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	The knowledge of the degradation pathways of natural dyes used in medieval textiles is necessary for the restoration of their original color. Quercetin, one of such colorants, reportedly yields the wide spectrum of oxidation products in different types of media. This study deals with electrochemical oxidation mechanism of quercetin in nonaqueous solution, which has not been yet attempted. The final oxidation product at the first oxidation wave was identified by HPLC-DAD and GC–MS techniques as 2-(3,4-dihydroxybenzoyl)-2,4,6-trihydroxybenzofuran-3(2H)-one. The apparent two-electron process at the potential of the first oxidation wave yields current–voltage shapes with one-electron characteristics. The in situ spectroelectrochemistry measurements proved the oxidation mechanism leading through a short-lived anion radical. The knowledge of the degradation pathways of natural dyes used in medieval textiles is necessary for the restoration of their original color. Quercetin, one of such colorants, reportedly yields the wide spectrum of oxidation products in different types of media. This study deals with electrochemical oxidation mechanism of quercetin in nonaqueous solution, which has not been yet attempted. The final oxidation product at the first oxidation wave was identified by HPLC-DAD and GC–MS techniques as 2-(3,4-dihydroxybenzoyl)-2,4,6-trihydroxybenzofuran-3(2H)-one. The apparent two-electron process at the potential of the first oxidation wave yields current–voltage shapes with one-electron characteristics. The in situ spectroelectrochemistry measurements proved the oxidation mechanism leading through a short-lived anion radical. (en)
Title	The oxidation mechanism of the antioxidant quercetin in nonaqueous media The oxidation mechanism of the antioxidant quercetin in nonaqueous media (en)
skos:prefLabel	The oxidation mechanism of the antioxidant quercetin in nonaqueous media The oxidation mechanism of the antioxidant quercetin in nonaqueous media (en)
skos:notation	RIV/61388955:_____/11:00361653!RIV12-GA0-61388955
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA203/08/1157), P(GA203/09/1607), P(OC 140), Z(AV0Z40400503), Z(AV0Z40550506)
http://linked.open...iv/cisloPeriodika	21
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Fiedler, Jan Ramešová, Šárka Sokolová, Romana Hromadová, Magdaléna Gál, Miroslav Bulíčková, Jana
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav fyzikální chemie J. Heyrovského AV ČR, v.v.i.
http://linked.open...dnocenehoVysledku	219317
http://linked.open...ai/riv/idVysledku	RIV/61388955:_____/11:00361653
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	cyclic voltammetry; electron transfer; flavonoids (en)
http://linked.open.../riv/klicoveSlovo	electron transfer cyclic voltammetry flavonoids
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[B25A9623A58A]
http://linked.open...i/riv/nazevZdroje	Electrochimica acta
http://linked.open...in/vavai/riv/obor	CG
http://linked.open...ichTvurcuVysledku	6 (xsd:int)
http://linked.open...cetTvurcuVysledku	8 (xsd:int)
http://linked.open...vavai/riv/projekt	Electrochemistry of natural pigments and their host-guest complexes. http://linked.opendata.cz/resource/domain/vavai/projekt/OC%20140 Tailoring the lock and key motifs in novel low-dimensional structures at electrified interface
http://linked.open...UplatneniVysledku	2011
http://linked.open...v/svazekPeriodika	56
http://linked.open...iv/tvurceVysledku	Fiedler, Jan Gál, Miroslav Hromadová, Magdaléna Sokolová, Romana Valášek, Michal Ramešová, Šárka Degano, I. Bulíčková, Jana
http://linked.open...ain/vavai/riv/wos	000294982700025
http://linked.open...n/vavai/riv/zamer	Struktura, reaktivita a dynamika molekulárních a biomolekulárních systémů: teorie, experiment, aplikace Regulace biologických procesů: Chemické modulátory vybraných systémů významných pro medicínu a zemědělství
issn	0013-4686
number of pages	7 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.electacta.2011.04.121

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