Abstract
IR spectroscopy is one of the most common spectroscopic methods for investigation of OH groups in zeolites and related materials. Zeolites contain a variety of OH groups, most of which have been studied by measuring the OH stretching vibration bands in the 3800-3200 cm−1 region using the transmission technique. DRIFT method has been used for obtaining OH combination tone and overtone bands. IR measurements, using a DRIFT attachment, a heated vacuum cell and a MCT detector, enable the observation of OH fundamental and combination bands in a single spectrum. The aim of this study is to obtain more detailed information on the OH vibration of MFI-type zeolites by studying two model substances, 18O exchanged HZSM-5 and Ge-ZSM-5.
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