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

Résultats de recherche: Contribution à un journal/une revueArticleRevue par des pairs


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.

langue originaleAnglais
Pages (de - à)857-862
Nombre de pages6
journalJournal of the Chemical Society, Faraday Transactions
Numéro de publication5
Les DOIs
Etat de la publicationPublié - 1 déc. 1993
Modification externeOui

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