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dc.contributor.author Rosso, Veridiana V. De
dc.contributor.author Moran Vieyra, Faustino Eduardo
dc.contributor.author Mercadante, Adriana Z.
dc.contributor.author Borsarelli, Claudio Darío
dc.date.available 2018-08-07T22:30:01Z
dc.date.issued 2008-12
dc.identifier.citation Rosso, Veridiana V. De; Moran Vieyra, Faustino Eduardo; Mercadante, Adriana Z.; Borsarelli, Claudio Darío; Singlet oxygen quenching by anthocyanin's flavylium cations; Taylor & Francis; Free Radical Research; 42; 10; 12-2008; 885-891
dc.identifier.issn 1071-5762
dc.identifier.uri http://hdl.handle.net/11336/54522
dc.description.abstract The 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 (k0) and chemical (kc) quenching rate constants were ∼ 4×108 M-1 S-1 and 3×106 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.format application/pdf
dc.language.iso eng
dc.publisher Taylor & Francis
dc.rights info:eu-repo/semantics/restrictedAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject ANTHOCYANINS
dc.subject ANTIOXIDANT CAPACITY
dc.subject FLAVYLIUM CATION
dc.subject PIGMENTS
dc.subject SINGLET OXYGEN
dc.subject.classification Otras Ciencias Químicas
dc.subject.classification Ciencias Químicas
dc.subject.classification CIENCIAS NATURALES Y EXACTAS
dc.title Singlet oxygen quenching by anthocyanin's flavylium cations
dc.type info:eu-repo/semantics/article
dc.type info:ar-repo/semantics/artículo
dc.type info:eu-repo/semantics/publishedVersion
dc.date.updated 2018-08-06T14:25:31Z
dc.identifier.eissn 1029-2470
dc.journal.volume 42
dc.journal.number 10
dc.journal.pagination 885-891
dc.journal.pais Reino Unido
dc.journal.ciudad Londres
dc.description.fil Fil: Rosso, Veridiana V. De. Universidade Estadual de Campinas; Brasil
dc.description.fil Fil: Moran Vieyra, Faustino Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto de Química del Noroeste. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia. Instituto de Química del Noroeste; Argentina
dc.description.fil Fil: Mercadante, Adriana Z.. Universidade Estadual de Campinas; Brasil
dc.description.fil Fil: Borsarelli, Claudio Darío. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto de Química del Noroeste. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia. Instituto de Química del Noroeste; Argentina
dc.journal.title Free Radical Research
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1080/10715760802506349
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/url/https://www.tandfonline.com/doi/abs/10.1080/10715760802506349
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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)