Previous and recent advances in pyranoanthocyanins equilibria in aqueous solution

• Type: Article in International Scientific Journal
• Date: 2014

Authors

Joana Oliveira (Author) FCUP; Nuno Mateus (Author) FCUP; Victor de Freitas (Author) FCUP

Journal

Title: Dyes and Pigments

Vol. 100

Pages: 190-200

ISSN: 0143-7208

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 64 Citations

Scopus - 0 Citations

Scientific classification

FOS: Engineering and technology > Chemical engineering

Other information

Authenticus ID: P-017-SF1

DOI: 10.1016/j.dyepig.2013.09.009

Abstract (EN): Pyranoanthocyanins are anthocyanin-derived compounds found in nature that present a vast palette of colours ranging from yellow to turquoise blue. Studies in aqueous solutions of these pigments by UV-Visible spectroscopy revealed their higher colour stability when compared to their anthocyanin precursors. Through Nuclear Magnetic Resonance (NMR) techniques it was possible to confirm the absence of hydration reactions in pyranoanthocyanins, contrarily to anthocyanins, which helps explaining their higher colour stability with the increase of the pH.

Language: English

Type (Professor's evaluation): Scientific