Mechanochemical Interaction of Silicon Dioxide with Chelating Polyphenol Compounds and Preparation of the Soluble Forms of Silicon
E. G. Shapolova1, K. G. Korolev1, O. I. Lomovsky2
1 Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the Russian Academy of Sciences Novosibirsk State University
2 Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the Russian Academy of Sciences
shapolova@solid.nsc.ru
Keywords: silicon dioxide, pyrocatechin, mechanocomposite, increase in dissolution rate, surface complexes
Pages: 575-580
Abstract
Mechanochemical treatment of pyrocatechin and natural gallocatechins with amorphous silicon dioxide leads to an increase in the rate of silicon dioxide dissolution as a result of the formation of chelate complexes. On the basis of model systems, we propose a mechanism of the interaction of polyphenols with silicon dioxide including the interaction of hydroxyl groups on the surface of silica with polyphenols and the formation of surface complexes. Starting from the proposed mechanism, we developed a procedure for the directed hydroxylation of the surface. Its application causes an increase in the process efficiency.
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