Stabilization of natural anthocyanin by intercalation into montmorillonite

Non-thermal stabilization mechanisms of anthocyanins in model and food systems—An overview

“…Moncada et al (2003) proved that a complexation with Al 3+ stabilizes the blue ionised quinoidal base avoiding its degradation by reaction with oxygen. In addition, Kohno et al (2009) related that the stability of natural anthocyanin toward alkaline environment and visible light irradiation was greatly enhanced by intercalation into montmorillonite. The enhancement of the stability was brought about both by the electrostatic interaction between the intercalated dye and the montmorillonite surface and by the protection of the intercalated dye from atmospheric oxygen.…”

“…Factors such as solvent, light, pH, temperature, structure and concentrations of copigments and anthocyanins, among others, significantly influence the association reactions. Table 3 summarizes some studies of The stability of natural anthocyanin was greatly enhanced by intercalation into montmorillonite Kohno et al (2009) Red raspberry fruits Intra-and intermolecular copigmentation Cyanidin 3-glucoside and cyanidin 3-sophoroside Phenolic acids Copigmentation reaction was more favorable at low temperature, pH 4.0, cyanidin 3-glucoside and with ferrulic and sinapic acid. Sun, Cao, Bai, Liao, and Hu (2010) Aqueous neutral solutions Self-association Not related Cyanin anhydrobase An circular dichroism was observed in the aged aqueous solution of cyanin anhydrobase, indicating self-association and enhancing the stability of the pigment.…”

Anthocyanidin Dye and Al/Fe-Containing Mesoporous Silica Composites and their Color Properties

“…It is reported that various dyes could be stabilized by their adsorption into the interlayer of clays 7,8,12,13) or pores of MPS 3,9,10) . However, AD dyes tend to decompose more easily than AN dyes as the sugar chain from anthocyanin has been removed by hydrolysis in the former.…”

Trapping characteristic of halloysite lumen for methyl orange

“…According to changes in dye photostability, the location and status of dye molecules on clay minerals can be speculated [37,38].…”