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T. M. Roshchina, T. A. Kuznetsova, M. S. Lagutova, A. M. Tolmachiov
Adsorption
of organic compounds vapors on silicas with threemethylsilyl layer
Abstract
The adsorption of different classes of organic compounds
vapors on modified silicas with silanes included threemethylsilil groups : (CH3)3SiI–(TMS) and (CH3)3Si(CH2)3(CH3)2SiCl (C3TMS) is
investigated. The influence of the nature of adsorbate and bonded groups on the
thermodynamic parameters of the adsorption is studied. It is shown, that
modifying of a surface leads to sharp decreasing Henry constants for n-alcanes
adsorption equilibrium in comparison with an initial matrix, and the
contribution of specific interactions to the adsorption, estimated by different
methods, on sample TMS is greater than on C3TMS.
Copyright (C) Chemistry Dept., Moscow State University, 2002
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