M. G. Mukhamediev, D. A. Gafurova, D. Zh. Bekchanov, D. N. Shakhidova, T. Kh. Rakhimov
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Solubilization of Gossypol with Polyvinylpyrrolidone
The physicochemical features of the solubilization of gossypol (GS) with polyivinylpyrrolidone (PVP) were studied. In contrast to the initial polyphenol, the solubilization product is a water-soluble supramolecular complex. As shown by IR spectroscopy, the complexation of PVP with GS occurs via hydrogen bonding between the carbonyl oxygen atom of the pyrrolidone ring of the polymer and hydroxyl proton of polyphenol. The relative viscosity of aqueous solutions of the supramolecular complex depends on its composition and passes through a minimum with the lowest value of the PVP : GS ratio close to 2 : 1. That is, at this component ratio, the structure of the complex in an aqueous medium is the most compact. The GS solubilization with PVP can be presented as adsorption of the polyphenol onto the polymer and can be described by the Langmuir monomolecular adsorption theory.
期刊介绍：
Russian Journal of Applied Chemistry (Zhurnal prikladnoi khimii) was founded in 1928. It covers all application problems of modern chemistry, including the structure of inorganic and organic compounds, kinetics and mechanisms of chemical reactions, problems of chemical processes and apparatus, borderline problems of chemistry, and applied research.
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