Acidity and location of cations (H+, Na+) in HEMT and NaEMT determined using benzene adsorption

Bao Lian Su, J. M. Manoli, C. Potvin, D. Barthomeuf

Research output: Contribution to journalArticlepeer-review

Abstract

Infrared spectroscopy is used to characterize the hydroxyls of HEMT and the interactions with benzene of these hydroxyls and of Na+ cations in NaEMT. Benzene adsorption studies reveal that HEMT is a stronger solid acid than HY or HSAPO-37 and that ca. 55-65% of the theoretical protons are still present after evacuation at 773 K. The changes with loading of the CH out-of-plane vibration of the adsorbed benzene give access to the number of interaction sites (H+ or Na+). In NaEMT all the cations are accessible to benzene. This may result from Na+ ion migration towards the large cages in the presence of the aromatic.

Original languageEnglish
Pages (from-to)857-862
Number of pages6
JournalJournal of the Chemical Society, Faraday Transactions
Volume89
Issue number5
DOIs
Publication statusPublished - 1 Dec 1993
Externally publishedYes

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