Abstract
The effect ethonium, a dicationic surfactant, has on the physicochemical properties of a natural flavonoid, rutin, is studied spectrophotometrically in a wide range of concentrations in the region of physiological pH. It is found there are a bathochromic shift of the bands in the absorption spectra of rutin, a drop in the apparent constant of its dissociation \({\text{p}}{K}_{{{\text{a1}}}}^{{\text{a}}}\), and an increase in solubility and adsorption on the surface of nanosilica relative to aqueous solutions. The constant of bonding between rutin and ethonium is calculated.
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Lipkovskaya, N.A., Barvinchenko, V.N. Physicochemical Properties of 3-Rutinoside-5,7,3',4'-tetrahydroxyflavone in Aqueous Solutions of Ethonium Surfactant. Russ. J. Phys. Chem. 92, 1706–1710 (2018). https://doi.org/10.1134/S0036024418090169
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DOI: https://doi.org/10.1134/S0036024418090169