Infrared study of the adsorption of octadecylamine at the MgO/CCl4 interface. A comparison with investigations of the adsorption of octadecylamine on SiO2 and Al2O3

Abstract

The adsorption of octadecylamine on highly dispersed magnesium oxide immersed in carbon tetrachloride has been studied by infrared spectroscopy. No difference could be detected between infrared bands appearing in the spectra of MgO in situ immersed in the pure solvent after contact with the solution of octadecylamine and MgO drained and evacuated at beam temperature. Adsorption of octadecylamine on MgO involves coordinative interactions between amine and Lewis-acidic surface sites. The results are discussed in comparison with those for the adsorption of octadecylamine at the SiO₂/CCl₄ and Al₂O₃/CCl₄ interfaces.