Effect of the surface condition of silicas with grafted monofunctional polyfluoroalkylsilanes on the adsorption of polar molecules

Lyophobized silicas containing relatively small numbers of grafted perfluorohexyl (1.1 nm −2 ) and perfluorobutyl (1.7 nm −2 ) groups are studied by means of gas chromatography, adsorption under static conditions, and IR spectroscopy. The results are compared to those obtained by us previously for a...

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Bibliographic Details
Published inRussian Journal of Physical Chemistry A Vol. 87; no. 8; pp. 1367 - 1373
Main Authors Roshchina, T. M., Shoniya, N. K., Tayakina, O. Ya, Tkachenko, O. P., Kustov, L. M.
Format Journal Article
LanguageEnglish
Published Boston Springer US 01.08.2013
Subjects
Chemistry
Chemistry and Materials Science
Physical Chemistry
Physical Chemistry of Surface Phenomena
adsorption
polyfluoroalkylsilanes
gas chromatography
IR spectroscopy
silicas
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Summary:Lyophobized silicas containing relatively small numbers of grafted perfluorohexyl (1.1 nm −2 ) and perfluorobutyl (1.7 nm −2 ) groups are studied by means of gas chromatography, adsorption under static conditions, and IR spectroscopy. The results are compared to those obtained by us previously for a series of samples with dense polyfluoroalkyl monolayers (≥2.0 nm −2 ). Effects related to the influence of the grafting density and the size of fluorine-containing groups on the adsorption of polar compounds and the hydrophobicity of the surface are discussed.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:0036-0244
1531-863X
DOI:10.1134/S0036024413080190