Title :

Probing oxygen exchange between UiO-66(Zr) MOF and water using 17O solid-state NMR

Author(s) :

Venel, Florian [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Giovine, Raynald [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Laurencin, Danielle [Auteur]
Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier [ICGM]
Špačková, Jessica [Auteur]
Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier [ICGM]
Mittelette, Sébastien [Auteur]
Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier [ICGM]
Métro, Thomas-Xavier [Auteur]
Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier [ICGM]
Volkringer, Christophe [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Lafon, Olivier [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Pourpoint, Frederique [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Journal title :

Chemistry - A European Journal

Volume number :

30

Pages :

e202302731

Publication date :

2024-01-21

ISSN :

1521-3765

English keyword(s) :

Zr-O bond
water
solid-state NMR
mechanochemistry
O-17
UiO-66

HAL domain(s) :

Chimie/Chimie inorganique

English abstract : [en]

The Zr-based Metal Organic Framework (MOF) UiO-66(Zr) is widely employed owing to its good thermal and chemical stabilities. Although the long-range structure of this MOF is preserved in the presence of water during several ...
Show more >The Zr-based Metal Organic Framework (MOF) UiO-66(Zr) is widely employed owing to its good thermal and chemical stabilities. Although the long-range structure of this MOF is preserved in the presence of water during several days, little is known about the formation of defects, which cannot be detected using diffraction techniques. We apply here 17O solid-state NMR spectroscopy at 18.8 T to investigate the reactivity of UiO-66, through the exchange of oxygen atoms between the different sites of the MOF and water. For that purpose, we have selectively enriched in 17O isotope the carboxylate groups of UiO-66(Zr) by using it with 17O-labeled terephthalic acid prepared using mechanochemistry. In the presence of water at 50 °C and a following dehydration at 150 °C, we observe an overall exchange of O atoms between COO− and μ3-O2− sites. Furthermore, we demonstrate that the three distinct oxygen sites, μ3-OH, μ3-O2− and COO−, of UiO-66(Zr) MOF can be enriched in 17O isotope by post-synthetic hydrothermal treatment in the presence of 17O-enriched water. These results demonstrate the lability of Zr−O bonds and the reactivity of UiO-66(Zr) with water.Show less >

Language :

Anglais

Audience :

Internationale

Popular science :

Non

European Project :

ERC

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) :

Matériaux hybrides (MATHYB)
RMN et matériaux inorganiques (RM2I)

Submission date :

2024-02-16T22:01:15Z
2024-02-27T13:50:49Z