Résumé
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 originale | Anglais |
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Pages (de - à) | 857-862 |
Nombre de pages | 6 |
journal | Journal of the Chemical Society, Faraday Transactions |
Volume | 89 |
Numéro de publication | 5 |
Les DOIs | |
Etat de la publication | Publié - 1 déc. 1993 |
Modification externe | Oui |