Titre :

Direct Identification of Zeolite Beta Polymorphs by Solid-State 29Si Nuclear Magnetic Resonance Spectroscopy

Auteur(s) :

Kolyagin, Yury [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Yakimov, Alexander V. [Auteur]
Zasukhin, Dmitry S. [Auteur]
Ivanova, Irina I. [Auteur]

Titre de la revue :

Journal of Physical Chemistry Letters

Nom court de la revue :

J. Phys. Chem. Lett.

Numéro :

13

Pagination :

10793-10798

Éditeur :

American Chemical Society (ACS)

Date de publication :

2022-11-14

Discipline(s) HAL :

Chimie/Chimie inorganique

Résumé en anglais : [en]

Stacking disorder and polymorphism in zeolite and zeolite-like materials hinder their structural characterization. In this work, we propose an advanced approach based on applying “pure shift” solid-state 29Si nuclear ...
Lire la suite >Stacking disorder and polymorphism in zeolite and zeolite-like materials hinder their structural characterization. In this work, we propose an advanced approach based on applying “pure shift” solid-state 29Si nuclear magnetic resonance (NMR) spectroscopy for the structural investigation of zeolitic materials containing intergrown polymorphs. The approach developed in the case study of zeolite beta allows for the resolution of 21 29Si signals, attributing them to non-equivalent T sites in polymorphs A, B, and C, reconstruction of individual 29Si magic angle spinning NMR spectra for each polymorph, and determination of the polymorph composition with higher accuracy than X-ray diffraction. The results reveal that two widely used synthetic routes for zeolite beta, alkaline and fluoride synthesis, lead to different polymorph compositions. These findings indicate that “pure shift” solid-state 29Si NMR can serve as a superior tool for the elucidation of polymorphism in zeolites.Lire moins >

Langue :

Anglais

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

Université de Lille
CNRS
Centrale Lille
ENSCL
Univ. Artois

Collections :

• Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Équipe(s) de recherche :

RMN et matériaux inorganiques (RM2I)

Date de dépôt :

2024-04-04T13:09:27Z