Singlet oxygen quenching by anthocyanin's flavylium cations

dc.creatorDe Rosso, VV
dc.creatorVieyra, FEM
dc.creatorMercadante, AZ
dc.creatorBorsarelli, CD
dc.date2008
dc.date2014-11-18T14:10:02Z
dc.date2015-11-26T17:29:34Z
dc.date2014-11-18T14:10:02Z
dc.date2015-11-26T17:29:34Z
dc.date.accessioned2018-03-29T00:16:33Z
dc.date.available2018-03-29T00:16:33Z
dc.identifierFree Radical Research. Informa Healthcare, v. 42, n. 10, n. 885, n. 891, 2008.
dc.identifier1071-5762
dc.identifierWOS:000260641600006
dc.identifier10.1080/10715760802506349
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/74276
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/74276
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/74276
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1285311
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionThe quenching of singlet molecular oxygen (1O2) by the flavylium cation form of six widespread anthocyanin derivatives: cyanidin 3-glucoside (CG), cyanidin 3-rutinoside (CR), cyanidin 3-galactoside (CGL), malvidin (M), malvidin 3-glucoside (MG) and malvidin 3,5-diglucoside (MDG) was studied in 1% HCl methanol solution by time-resolved phosphorescence detection (TRPD) of 1O2 and photostationary actinometry using perinaphthenone and methylene blue as sensitizers, respectively. The average value of the total (k 0) and chemical (k c) quenching rate constants were 4108 m-1 s-1 and 3106 m-1 s-1, respectively, indicating the good performance of the studied anthocyanins as catalytic quenchers of 1O2. The quenching efficiency was larger for malvidin than for cyanidin derivatives, probably by the extra electron-donating methoxy group in ring B of the malvidin derivatives; and it was also dependent on the number and type of glycosylated substitution. As observed for other phenolic-like derivatives, the quenching of 1O2 by anthocyanins was mediated by a charge-transfer mechanism, which was modulated by the total number of -OR substituents that increases the electron-donating ability of these compounds.
dc.description42
dc.description10
dc.description885
dc.description891
dc.descriptionCICyT-UNSE
dc.descriptionCONICET (Argentina)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.languageen
dc.publisherInforma Healthcare
dc.publisherLondon
dc.publisherInglaterra
dc.relationFree Radical Research
dc.relationFree Radic. Res.
dc.rightsfechado
dc.rightshttp://informahealthcare.com/userimages/ContentEditor/1255620309227/Copyright_And_Permissions.pdf
dc.sourceWeb of Science
dc.subjectAnthocyanins
dc.subjectsinglet oxygen
dc.subjectflavylium cation
dc.subjectpigments
dc.subjectantioxidant capacity
dc.subjectMolecular-oxygen
dc.subjectPhotosensitized Oxygenation
dc.subjectAntioxidant Activity
dc.subjectOxidative Stress
dc.subjectHplc-pda
dc.subjectFlavonoids
dc.subjectCells
dc.subjectCarotenoids
dc.subjectSolvent
dc.subjectFruits
dc.titleSinglet oxygen quenching by anthocyanin's flavylium cations
dc.typeArtículos de revistas


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