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.
Idioma:
Inglês
Tipo (Avaliação Docente):
Científica
Nº de páginas:
7