Abstract

The fundamental and combination vibrations of hydroxyl groups in zeolites (Y, ZSM-5) and silicoaluminophosphates (SAPO-5, -17, -34) are investigated. The influence of adsorbed molecules (C 6F 6, n-hexane) on the combination vibrations is also studied. Finally, remarks on quantitative evaluation of DRIFT spectra of NaHZSM-5 containing different amounts of bridging OH groups are given.

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