Studies of the Acidity of High-Silica Zeolites

使用多种技术，包括同步程序升温脱附和热重分析、红外光谱和碳13核磁共振，将在高硅沸石中考察可以经历酸催化化学的简单有机分子的吸附。这些吸附研究的目的将是研究中间体与沸石晶格的相互作用，并最终建立结构/反应关系，从而深入了解酸性中心发生的化学作用。为了确定这些性质如何影响酸性中心的性质，我们将研究具有不同晶体结构和不同三价阳离子的沸石。即将进行的实验应该为更详细地了解高硅沸石的酸性提供基础。

The adsorption of simple organic molecules which can undergo acid-catalyzed chemistry will be examined in high-silica zeolites using a variety of techniques, including simultaneous temperature-programmed desorption and thermal gravimetric analysis, infrared spectroscopy, and carbon-13 nuclear magnetic resonance. The purpose of these adsorption studies will be to study the interaction of intermediates with the zeolite lattice and ultimately to formulate structure/reactivity relationships which can give insight into the chemistry occurring at the acid sites. Zeolites with different crystal structures and with different trivalent cations incorporated into the lattice will be studied in order to determine how these properties affect the properties of the acid sites. The experiments to be conducted should provide a basis for a more detailed understanding of the acidity of high-silica zeolites.