title: Characterization of surface of trifluorophenylketoiminepropyl stationary phase coated porous layer open tubular columns.
abstract: A series of 3 fluorinated adsorbents were prepared by bonding 4,4,4-trifluoro-1-phenyl-1,3-ketoiminepropyl silane onto 5μm Nucleosil silica. The first one contained sole fluoroketoimine groups, while the other two adsorbents were derivatives of the first one with copper(II) chloride and copper(II) acetylacetonate bound through the fluoroketoimine groups. A description of syntheses of these adsorbents is given and the course of each stage of the syntheses is characterized by elemental analysis, surface area determination, UV-vis, EPR, ICP-OES, IR, (29)Si NMR, (13)C NMR and thermogravimetric analysis. For the columns coated with the adsorbents obtained the donor-acceptor character of the adsorption layer was established and the enthalpy of adsorption was determined for a selected group of hydrocarbons. The evenness of capillary column walls coating and mechanical stability of the stationary phases was evaluated on the basis of the flow restriction factor and SEM images. Efficiency of the columns obtained and their comparison with commercial counterparts are presented.
authors: Faculty of Chemistry, Adam Mickiewicz University, Grunwaldzka 6, 60-780 Poznań, Poland. rafwawrz@amu.edu.pl
authors: Rafał
authors: R
authors: Wawrzyniak
authors: Katarzyna
authors: K
authors: Adamska
mesh_terms: D000327:Adsorption; D004578:Electron Spin Resonance Spectroscopy; D006838:Hydrocarbons / Q000737:chemistry*; D007659:Ketones / Q000737:chemistry*; D013057:Spectrum Analysis / Q000379:methods; D013818:Thermogravimetry
chemical_list: D006838:Hydrocarbons; D007659:Ketones