Abstract
The adsorption of isopropylamine and cyclohexylamine on Al 2O 3 and Fe 2O 3, and of isopropylamine on SiO 2, MgO, and CaO has been studied by infrared spectroscopy and temperature-programmed desorption (TPD). Surface complexes are formed at beam temperature as a result of hydrogen bonding and dissociative adsorption on SiO 2, and formation of coordination bonds between amine molecules and Lewis-acidic surface sites on the other oxides. With increasing temperature during TPD, in addition to the unchanged amines, products desorb, which indicates the occurrence of CN bond breakage and dehydrogenation reactions.
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