Electron Transfers Induced by t-Stilbene ...
Type de document :
Article dans une revue scientifique
DOI :
URL permanente :
Titre :
Electron Transfers Induced by t-Stilbene Sorption in Acidic Aluminum, Gallium, and Boron Beta (BEA) Zeolites
Auteur(s) :
Lobo, Raul F. [Auteur]
University of Delaware [Newark]
Moissette, Alain [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Hureau, Matthieu [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Carré, Sonia [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Vezin, Herve [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Legrand, Alexandre [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
University of Delaware [Newark]
Moissette, Alain [Auteur]

Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Hureau, Matthieu [Auteur]

Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Carré, Sonia [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Vezin, Herve [Auteur]

Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Legrand, Alexandre [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Titre de la revue :
The Journal of Physical Chemistry C
Nom court de la revue :
J. Phys. Chem. C
Numéro :
116
Pagination :
14480-14490
Éditeur :
American Chemical Society (ACS)
Date de publication :
2012-06-28
ISSN :
1932-7455
Mot(s)-clé(s) en anglais :
Charge transfer
Zeolites
Molecules
Ionization
Cations
Zeolites
Molecules
Ionization
Cations
Discipline(s) HAL :
Chimie/Chimie théorique et/ou physique
Résumé en anglais : [en]
The adsorption of trans-stilbene (t-St) on the acidic aluminum-, gallium-, and boron-containing zeolite beta (H-AlBEA, H-GaBEA, and H-BBEA, respectively) is investigated using UV/vis and time-resolved UV/vis spectroscopy, ...
Lire la suite >The adsorption of trans-stilbene (t-St) on the acidic aluminum-, gallium-, and boron-containing zeolite beta (H-AlBEA, H-GaBEA, and H-BBEA, respectively) is investigated using UV/vis and time-resolved UV/vis spectroscopy, electron paramagnetic resonance spectroscopy, and Raman spectroscopy. On H-AlBEA, the results show a fast and spontaneous one-electron oxidation of t-St, quickly followed by the recapture of an electron from the zeolite framework by the t-St•+ radical cation and the formation of a long-lived charge-transfer complex (t-St H-AlBEA•–•+). This charge-transfer complex (I) evolves over a period of months into a spectroscopically distinct charge-transfer complex (II). Evidence for the (undetected) intermediate t-St•+ radical cation is obtained using time-resolved UV/vis spectroscopy. Similar electron-transfer processes have been observed in the acidic ferrierite, ZSM-5, and mordenite aluminosilicate zeolites. The key difference is that the rate of electron recapture by the t-St•+ radical cation is much faster than that in all of the other zeolites. This is in agreement with the trend observed in the ferrierite, ZSM-5, and mordenite zeolites: looser fit leads to a lower stability of the radical cation intermediate and leads to a rapid hole transfer to the zeolite framework to form a charge-transfer complex. In the case of boron-containing beta, the rate of formation of the radical cation is slow, and the yield is small. Gallium-containing zeolite beta shows intermediate behavior when compared with the Al and B forms of zeolite beta.Lire moins >
Lire la suite >The adsorption of trans-stilbene (t-St) on the acidic aluminum-, gallium-, and boron-containing zeolite beta (H-AlBEA, H-GaBEA, and H-BBEA, respectively) is investigated using UV/vis and time-resolved UV/vis spectroscopy, electron paramagnetic resonance spectroscopy, and Raman spectroscopy. On H-AlBEA, the results show a fast and spontaneous one-electron oxidation of t-St, quickly followed by the recapture of an electron from the zeolite framework by the t-St•+ radical cation and the formation of a long-lived charge-transfer complex (t-St H-AlBEA•–•+). This charge-transfer complex (I) evolves over a period of months into a spectroscopically distinct charge-transfer complex (II). Evidence for the (undetected) intermediate t-St•+ radical cation is obtained using time-resolved UV/vis spectroscopy. Similar electron-transfer processes have been observed in the acidic ferrierite, ZSM-5, and mordenite aluminosilicate zeolites. The key difference is that the rate of electron recapture by the t-St•+ radical cation is much faster than that in all of the other zeolites. This is in agreement with the trend observed in the ferrierite, ZSM-5, and mordenite zeolites: looser fit leads to a lower stability of the radical cation intermediate and leads to a rapid hole transfer to the zeolite framework to form a charge-transfer complex. In the case of boron-containing beta, the rate of formation of the radical cation is slow, and the yield is small. Gallium-containing zeolite beta shows intermediate behavior when compared with the Al and B forms of zeolite beta.Lire moins >
Comité de lecture :
Oui
Audience :
Internationale
Vulgarisation :
Non
Établissement(s) :
Université de Lille
CNRS
CNRS
Collections :
Équipe(s) de recherche :
Propriétés magnéto structurales des matériaux (PMSM)
Date de dépôt :
2021-06-17T15:32:12Z
2021-10-05T10:33:49Z
2021-10-05T10:33:49Z