The peculiarity of malvidin 3-O-(6-O-p-coumaroyl) glucoside aggregation. Intra and intermolecular interactions

• Type: Article in International Scientific Journal
• Date: 2020

Authors

Mendoza, J (Author) Other; Joana Oliveira (Author) FCUP; Araujo, P (Author) Other; Basilio, N (Author) Other; Teixeira, N (Author) Other; Natercia F Bras (Author) FCUP; Pina, F (Author) Other; Yoshida, K (Author) Other; Victor de Freitas (Author) FCUP

Journal

Title: Dyes and Pigments

Vol. 180

ISSN: 0143-7208

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 9 Citations

Scopus - 11 Citations

Other information

Authenticus ID: P-00S-07Q

DOI: 10.1016/j.dyepig.2020.108382

Abstract (EN): The aggregation of malvidin 3-O-(6-O-p-coumaroyl) glucoside flavylium cation (OeninCoum) in water is reported. Intra and intermolecular interactions of OeninCoum were characterized by UV-vis absorption, H-1 NMR and circular dichroism (CD). Theoretical calculations were also performed to describe the intramolecular interactions. At higher temperature (>60 degrees C) the intermolecular aggregates are disrupted but CD signal attributed to an intramolecular interaction remains. Moreover, the kinetic and thermodynamic data for Oenin and OeninCoum at 50 degrees C and 25 degrees C shows that the increase of temperature stabilizes the quinoidal base of this later.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7