Article (Scientific journals)
Functionalization of Mono- and Bimetallic MIL-100(Al,Fe) MOFs by Ethylenediamine: Postfunctionalization, Brønsted Acido-Basicity, and Unusual CO2 Sorption Behavior
Steenhaut, Thimoty; Fusaro, Luca; Robeyns, Koen et al.
2021In Inorganic Chemistry, 60 (21), p. 16666 - 16677
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Abstract :
[en] The metal sites of MIL-100(Fe), MIL-100(Fe,Al), and MIL-100(Al) metal–organic frameworks (MOFs) were decorated with ethylenediamine (EN). Interestingly, the Al-containing MOFs presented hierarchized porosity, and their structural integrity was maintained upon functionalization. Solution and solid-state NMR confirmed the grafting efficiency in the case of MIL-100(Al) and the presence of a free amine group. It was shown that MIL-100(Al) can be functionalized by only one EN molecule in each trimeric Al3O cluster unit, whereas the other two aluminum sites are occupied by a hydroxyl and a water molecule. The −NH2 sites of the grafted ethylenediamine can be used for further postfunctionalization through amine chemistry and are responsible for the basicity of the functionalized material as well as increased affinity for CO2. Furthermore, the presence of coordinated water molecules on the Al-MOF is responsible for simultaneous Brønsted acidity. Finally, the Al-containing MOFs show an unusual carbon dioxide sorption mechanism at high pressures that distinguishes those materials from their iron and chromium counterparts and is suspected to be due to the presence of polarized Al–OH bonds.
Disciplines :
Chemical engineering
Materials science & engineering
Author, co-author :
Steenhaut, Thimoty
Fusaro, Luca
Robeyns, Koen
Lacour, Seraphin
Li, Xiao
Mahy, Julien  ;  Université de Liège - ULiège > Department of Chemical Engineering > Nanomaterials, Catalysis, Electrochemistry
Louppe, Véronique
Grégoire, Nicolas
Barozzino-Consiglio, Gabriella
Statsyns, Jean-François
Aprile, Carmela
Filinchuk, Yaroslav
Hermans, Sophie
More authors (3 more) Less
Language :
English
Title :
Functionalization of Mono- and Bimetallic MIL-100(Al,Fe) MOFs by Ethylenediamine: Postfunctionalization, Brønsted Acido-Basicity, and Unusual CO2 Sorption Behavior
Publication date :
01 November 2021
Journal title :
Inorganic Chemistry
ISSN :
0020-1669
eISSN :
1520-510X
Publisher :
Wiley
Volume :
60
Issue :
21
Pages :
16666 - 16677
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 21 October 2021

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