Title :

Determination of electronic recombination free energy in zeolites: effect of the charge balancing cation and of the confinement.

Author(s) :

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

Journal title :

ChemPhysChem

Abbreviated title :

Chemphyschem

Publication date :

2020-05-02

ISSN :

1439-7641

English keyword(s) :

activation energy
diphenylhexatriene
Marcus theory
photo-induced electron transfer
zeolites

HAL domain(s) :

Chimie/Chimie théorique et/ou physique

English abstract : [en]

The adsorption of DPH in M6.6ZSM-5 (M=Na+, K+, Rb+, Cs+), RbFER and RbMOR channel zeolites takes place without chemical or structural modification. After photoexcitation of these systems, a radical cation–electron pair is ...
Show more >The adsorption of DPH in M6.6ZSM-5 (M=Na+, K+, Rb+, Cs+), RbFER and RbMOR channel zeolites takes place without chemical or structural modification. After photoexcitation of these systems, a radical cation–electron pair is observed and has a sufficiently long lifetime to be studied by diffuse reflectance UV-visible spectroscopy. The study of the recombination of this radical cation-electron pair was carried out at different temperatures and allowed the determination of the activation energy as a function of the nature of the charge-balancing cation but also of the confinement effect. It appears that the activation energy decreases progressively from Na+ to Cs+ but also when the confinement decreases. To go further, the free enthalpies have been calculated from the Marcus theory demonstrating experimentally that these systems are located in the inverted Marcus region.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

Université de Lille
CNRS

Collections :

• Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516

Submission date :

2024-02-28T22:56:51Z
2024-03-12T14:19:48Z