Title :

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

Author(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]

Journal title :

Journal of Physical Chemistry Letters

Abbreviated title :

J. Phys. Chem. Lett.

Volume number :

13

Pages :

10793-10798

Publisher :

American Chemical Society (ACS)

Publication date :

2022-11-14

HAL domain(s) :

Chimie/Chimie inorganique

English abstract : [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 ...
Show more >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.Show less >

Language :

Anglais

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

Université de Lille
CNRS
Centrale Lille
ENSCL
Univ. Artois

Collections :

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

Research team(s) :

RMN et matériaux inorganiques (RM2I)

Submission date :

2024-04-04T13:09:27Z