Electron Transfers Under Confinement in ...
Type de document :
Partie d'ouvrage: Chapitre
URL permanente :
Titre :
Electron Transfers Under Confinement in Channel-Type Zeolites
Auteur(s) :
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 - UMR 8516 [LASIRE]
Hureau, Matthieu [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 - UMR 8516 [LASIRE]
Lobo, Raul F. [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 - UMR 8516 [LASIRE]
Hureau, Matthieu [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 - UMR 8516 [LASIRE]
Lobo, Raul F. [Auteur]
Titre de l’ouvrage :
Chemistry of Silica and Zeolite-Based Materials
Pagination :
249-271
Éditeur :
Elsevier
Date de publication :
2019
ISBN :
9780128178133
Mot(s)-clé(s) en anglais :
Channel-type zeolite
sorption
polyaromatic molecule
ionization
electron transfer
long-lived charge separated
state confinement
sorption
polyaromatic molecule
ionization
electron transfer
long-lived charge separated
state confinement
Discipline(s) HAL :
Chimie/Chimie théorique et/ou physique
Résumé en anglais : [en]
Electron transfers following the ionization of probe molecules adsorbed in channel-type zeolites are reported as a function of the internal confinement (ferrierite—FER, zeolite socony Mobil-FIve—MFI, mordenite—MOR, beta—BEA), ...
Lire la suite >Electron transfers following the ionization of probe molecules adsorbed in channel-type zeolites are reported as a function of the internal confinement (ferrierite—FER, zeolite socony Mobil-FIve—MFI, mordenite—MOR, beta—BEA), of the molecule type and of the charge-balancing cation. Spontaneous ionization is observed in acidic zeolites for all molecules and all zeolite morphologies. This process occurs also in nonacidic and even in Al-free MFI for molecules with low ionization potential like aromatic amines (I.P. <7 eV) and for molecules with higher ionization potential in Li-, Na-exchanged zeolites when confinement is very tight (FER). In the absence of spontaneous ionization, photoexcitation is required to induce charge separation. Regardless of the initial ionization process (spontaneous or photoinduced), the electron transfers and transient species formed are identical but exhibit very different lifetimes from seconds to months. The crucial role of the internal porosity in the reactivity is demonstrated by comparing the behavior of molecules able to penetrate into the pores and molecules of the same family unable to enter due to sterical constraints.Lire moins >
Lire la suite >Electron transfers following the ionization of probe molecules adsorbed in channel-type zeolites are reported as a function of the internal confinement (ferrierite—FER, zeolite socony Mobil-FIve—MFI, mordenite—MOR, beta—BEA), of the molecule type and of the charge-balancing cation. Spontaneous ionization is observed in acidic zeolites for all molecules and all zeolite morphologies. This process occurs also in nonacidic and even in Al-free MFI for molecules with low ionization potential like aromatic amines (I.P. <7 eV) and for molecules with higher ionization potential in Li-, Na-exchanged zeolites when confinement is very tight (FER). In the absence of spontaneous ionization, photoexcitation is required to induce charge separation. Regardless of the initial ionization process (spontaneous or photoinduced), the electron transfers and transient species formed are identical but exhibit very different lifetimes from seconds to months. The crucial role of the internal porosity in the reactivity is demonstrated by comparing the behavior of molecules able to penetrate into the pores and molecules of the same family unable to enter due to sterical constraints.Lire moins >
Langue :
Anglais
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 :
2021-06-17T13:13:46Z
2021-06-28T12:01:41Z
2021-06-28T12:01:41Z