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

doi:10.1039/FT9938900857

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

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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
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	https://doi.org/10.1039/FT9938900857
Etat de la publication	Publié - 1 déc. 1993
Modification externe	Oui

Accès au document

10.1039/FT9938900857

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Contient cette citation

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

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.",

author = "Su, {Bao Lian} and Manoli, {J. M.} and C. Potvin and D. Barthomeuf",

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T1 - Acidity and location of cations (H+, Na+) in HEMT and NaEMT determined using benzene adsorption

AU - Su, Bao Lian

AU - Manoli, J. M.

AU - Potvin, C.

AU - Barthomeuf, D.

PY - 1993/12/1

Y1 - 1993/12/1

N2 - 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.

AB - 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.

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JO - Journal of the Chemical Society, Faraday Transactions

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