Photoinduced electron-hole recombination ...
Document type :
Article dans une revue scientifique: Article original
Permalink :
Title :
Photoinduced electron-hole recombination in zeolites: Marcus theory applied to DCB@MFI systems
Author(s) :
Hureau, Matthieu [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Duplouy, L. [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Andrade, Pedro [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
De Waele, Vincent [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Moissette, Alain [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Duplouy, L. [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Andrade, Pedro [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
De Waele, Vincent [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Moissette, Alain [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Journal title :
J. Photochem. Photobiol. A-Chem.
Abbreviated title :
J. Photochem. Photobiol. A-Chem.
Volume number :
448
Pages :
115337
Publication date :
2024-02-23
ISSN :
1010-6030
English keyword(s) :
Zeolite
Silicalite-1
ZSM-5
4-Dicyanobenzene
Electron transfer
Time -resolved diffuse reflectance UV-vis
spectroscopy
Silicalite-1
ZSM-5
4-Dicyanobenzene
Electron transfer
Time -resolved diffuse reflectance UV-vis
spectroscopy
HAL domain(s) :
Chimie/Chimie théorique et/ou physique
English abstract : [en]
The adsorption of DCB in MZSM-5 (M = H+, Na+) and silicalite-1 channel zeolites takes place without chemical or structural modification of the zeolite. Upon UV photoexcitation, a radical anion - hole pair is stabilized as ...
Show more >The adsorption of DCB in MZSM-5 (M = H+, Na+) and silicalite-1 channel zeolites takes place without chemical or structural modification of the zeolite. Upon UV photoexcitation, a radical anion - hole pair is stabilized as demonstrated by time resolved diffuse reflectance UV–visible spectroscopy. The photogeneration of the radical anion DCBradical dot- is assigned to the dual (ambivalent) role of the zeolite framework as electron donor and hole stabilizator. The observation of such electron transfer only in the aluminated zeolite highlights the key role of the aluminum and of charge balancing cations. By studying the recombination of the radical anion – hole pairs at different temperature, the activation energy has been determined as a function of the nature of the charge-balancing cation. The values of the free enthalpy have been calculated using the Marcus theory from which the local redox potential of the zeolite has been estimated.Show less >
Show more >The adsorption of DCB in MZSM-5 (M = H+, Na+) and silicalite-1 channel zeolites takes place without chemical or structural modification of the zeolite. Upon UV photoexcitation, a radical anion - hole pair is stabilized as demonstrated by time resolved diffuse reflectance UV–visible spectroscopy. The photogeneration of the radical anion DCBradical dot- is assigned to the dual (ambivalent) role of the zeolite framework as electron donor and hole stabilizator. The observation of such electron transfer only in the aluminated zeolite highlights the key role of the aluminum and of charge balancing cations. By studying the recombination of the radical anion – hole pairs at different temperature, the activation energy has been determined as a function of the nature of the charge-balancing cation. The values of the free enthalpy have been calculated using the Marcus theory from which the local redox potential of the zeolite has been estimated.Show less >
Language :
Anglais
Audience :
Internationale
Popular science :
Non
Administrative institution(s) :
Université de Lille
CNRS
CNRS
Collections :
Research team(s) :
Photodynamique, confinement, solvatation (PCS)
Submission date :
2024-02-28T23:58:14Z
2024-03-20T10:33:58Z
2024-03-20T10:33:58Z