Abstract
Procedure for modifying the silica gel surface with pyrenyl groups, based on a chemical assembly of surface compounds, was developed. The procedure includes successive treatments of silica with (2-phenylethyl) trichlorosilane, water, chloromethyl methyl ether, and pyrene. The reaction conditions providing the maximum content of grafted pyrenyl groups were determined. The possibility of using the resulting modified silica gel as a sorbent in chromatographic separation of C60 and C70 fullerenes was examined and its high efficiency in obtaining pure C70 fullerenes was demonstrated.
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