Sokoll R, Tiller HJ
Institut für Physikalische Chemie, Friedrich-Schiller-Universität Jena, Lessingstrasse 10, Jena, D-07743, Germany
J Colloid Interface Sci. 1998 Sep 15;205(2):489-495. doi: 10.1006/jcis.1998.5638.
The adsorption of perfluoro-n-pentane and perfluoro-n-hexane on gamma-Al2O3 at the solid/vapor interface has been studied by infrared spectroscopy and temperature-programed desorption (TPD). At ambient beam temperature perfluorocarbons are adsorbed as intact, unchanged molecules and undergo chemical transformations leading to the formation of adsorbed, unsaturated carboxylate species. With increasing temperature further reactions occur, finally resulting in deep oxidation of all adsorbed species (indicated by desorption of CO and CO2). These reactions are initiated by the formation of coordination bonds between perfluorocarbons and Lewis-acidic surface sites (coordinatively unsaturated cations) of Al2O3, followed by abstraction of fluorine from the adsorbed molecules. Copyright 1998 Academic Press.
通过红外光谱和程序升温脱附（TPD）研究了全氟正戊烷和全氟正己烷在γ -Al2O3 固/气界面上的吸附。在环境束流温度下，全氟碳化合物以完整、未变化的分子形式吸附，并发生化学转化，导致形成吸附的不饱和羧酸盐物种。随着温度升高，进一步的反应发生，最终导致所有吸附物种深度氧化（以CO和CO2 的脱附表示）。这些反应由全氟碳化合物与Al2O3 的路易斯酸性表面位点（配位不饱和阳离子）之间形成配位键引发，随后从吸附分子中提取氟。版权所有1998年学术出版社。
