Abstract
Silver nanoparticles (SNPs) are obtained from silver nitrate via borohydride reduction followed by stabilization with cholesterol and thiocholesterol in different molar ratios. According to TEM results, the average size of SNPs stabilized by cholesterol is 5.5 ± 0.8 nm. that the average size of those stabilized by thiocholesterol is 2.5 ± 0.4 nm. Calculations for a model interaction between silver and ligands shows that thiocholesterol is a stronger stabilizer of SNPs. SNPs stabilized by thiocholesterol are used as modifiers of silica gel surfaces. Adsorption isotherms are constructed and quantitative characteristics of SNP adsorption on silica gel are determined. The best quantitative characteristics of adsorption are obtained for the molar ratio SNP : thiocholesterol = 1 : 2. Hybrid metal-mesogenic SNP–thiocholesterol nanosystems are used as chiral matrices to separate a series of optically active test compounds using TLC with a selectivity coefficient of 1.6.
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