Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12253/500
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dc.contributor.authorFigueiredo, Paulo-
dc.contributor.authorPina, Fernando-
dc.date.accessioned2012-03-06T15:46:15Z-
dc.date.available2012-03-06T15:46:15Z-
dc.date.issued1994-
dc.identifier.citationJ. CHEM. SOC. PERKIN TRANS. 2 1994, 775-778pt_PT
dc.identifier.urihttp://hdl.handle.net/10884/500-
dc.description.abstractThe influence of the addition of ionic salts (NaCI, NaBr, Nal, NaCIO,) on anthocyanin equilibria is studied in this work. The effect of their addition is a colour enhancement through the formation of an ion-pair between the charged flavylium cation and the anion, which displaces the equilibria towards the coloured flavylium form. The ion-pair formation is an alternative model to that which suggests a preferable hydration of salt anions instead of the flavylium cation. Throughout this work two natural anthocyanins are studied (malvidin 3,5-diglucoside and malvidin 3-glucoside) as well as one anthocyanidin (malvidin). The thermal and photochemical stability of the ion-pairs formed is also examined. Ex per i ments with a synthetic a n t h ocya n i n a na I og ue (4', 7 - d i h ydroxyf lavy I i u m c h lor ide) w h ic h has photochromic properties are also described for comparison purposespt_PT
dc.language.isoengpt_PT
dc.rightsopenAccessen
dc.subjectAnthocyaninpt_PT
dc.subjectIon-pairspt_PT
dc.subjectCo-pigmentationpt_PT
dc.titleFormation of Anthocyanin Ion-pairs. A Co-Pigmentation Effectpt_PT
dc.typearticlept_PT
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