Issue 44, 2023

Flexibility in zeolites: origin, limits, and evaluation

Abstract

Numerous pieces of evidence in the literature suggest that zeolitic materials exhibit significant intrinsic flexibility as a consequence of the spring-like behavior of Si–O and Al–O bonds and the distortion ability of Si–O–Si and Al–O–Si angles. Understanding the origin of flexibility and how it may be tuned to afford high adsorption selectivity in zeolites is a big challenge. Zeolite flexibility may be triggered by changes in temperature, pressure, or chemical composition of the framework and extra-framework compounds, as well as by the presence of guest molecules. Therefore, zeolite flexibility can be classified into three categories: (i) temperature and pressure-induced flexibility; (ii) guest-induced flexibility; and (iii) compositionally-induced flexibility. An outlook on zeolite flexibility and the challenges met during the precise experimental evaluations of zeolites will be discussed. Overcoming these challenges will provide an important tool for designing novel selective adsorbents.

Graphical abstract: Flexibility in zeolites: origin, limits, and evaluation

Article information

Article type
Perspective
Submitted
29 Jul 2023
Accepted
12 Oct 2023
First published
23 Oct 2023
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY-NC license

Chem. Sci., 2023,14, 12430-12446

Flexibility in zeolites: origin, limits, and evaluation

S. Ghojavand, E. Dib and S. Mintova, Chem. Sci., 2023, 14, 12430 DOI: 10.1039/D3SC03934J

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