Please use this identifier to cite or link to this item: https://hdl.handle.net/10216/94223
Author(s): Joana Oliveira
Joana Azevedo
Artur M S Silva
Natercia Teixeira
Luis Cruz
Nuno Mateus
Victor de Freitas
Title: Pyranoanthocyanin Dimers: A New Family of Turquoise Blue Anthocyanin-Derived Pigments Found in Port Wine
Issue Date: 2010
Abstract: In the present work, several compounds bearing similar spectroscopic features were found to occur in aged Port wines and respective sediments (lees). The data obtained revealed two new families of compounds with unique spectroscopic characteristics, displaying a wavelength of the maximum absorption at high wavelength in the visible spectrum at similar to 730 and similar to 680 nm. The structure of these pigments was elucidated by liquid chromatography/diode array detector mass spectrometry (LC/DAD MS) and nuclear magnetic resonance (NMR), and their formation pathway in wines was established. Their structure is constituted by two pyranoanthocyanin moieties linked together through a methyne bridge. This new family of compounds displays an attractive and rare turquoise blue color at acidic conditions and has never been reported in the literature.
Subject: Outras ciências agrárias
Other Agrarian Sciences
Scientific areas: Ciências agrárias::Outras ciências agrárias
Agrarian Sciences::Other Agrarian Sciences
URI: https://repositorio-aberto.up.pt/handle/10216/94223
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:FCUP - Artigo em Revista Científica Internacional

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