Physicochemical studies of new anthocyano-ellagitannin hybrid pigments: about the origin of the influence of oak C-glycosidic ellagitannins on wine color - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Access content directly
Journal Articles Global Change Biology Year : 2010

Physicochemical studies of new anthocyano-ellagitannin hybrid pigments: about the origin of the influence of oak C-glycosidic ellagitannins on wine color

Abstract

Kinetic and thermodynamic UV/Vis and structural NMR spectroscopic investigations on the anthocyano-ellagitannin hybrid 1-deoxyvescalagin-(18)-oenin revealed that its enhanced color stability relative to that of the red-colored pigment oenin and resulting bathochromism can be rationalized in terms of an intramolecular -stacking between the grape-derived oenin chromophore and the oak-derived vescalagin 4,6-hexahydroxydiphenoyl moiety. The results led us to suggest that this bathochromism-inducing molecular association could be the first ellagitannin-based molecular-level explanation of the red-to-purple color change that takes place during the aging of wine in oak barrels.

Dates and versions

hal-02665688 , version 1 (31-05-2020)

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Stefan Chassaing, Dorothée Lefeuvre, Rémi Jacquet, Michael Jourdes, Laurent Ducasse, et al.. Physicochemical studies of new anthocyano-ellagitannin hybrid pigments: about the origin of the influence of oak C-glycosidic ellagitannins on wine color. Global Change Biology, 2010, 2010 (1), pp.55 - 63. ⟨10.1002/ejoc.200901133⟩. ⟨hal-02665688⟩
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