Towards general network architecture design criteria for negative gas adsorption transitions in ultraporous frameworks.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
12 Aug 2019
12 Aug 2019
Historique:
received:
19
03
2019
accepted:
23
07
2019
entrez:
14
8
2019
pubmed:
14
8
2019
medline:
14
8
2019
Statut:
epublish
Résumé
Switchable metal-organic frameworks (MOFs) have been proposed for various energy-related storage and separation applications, but the mechanistic understanding of adsorption-induced switching transitions is still at an early stage. Here we report critical design criteria for negative gas adsorption (NGA), a counterintuitive feature of pressure amplifying materials, hitherto uniquely observed in a highly porous framework compound (DUT-49). These criteria are derived by analysing the physical effects of micromechanics, pore size, interpenetration, adsorption enthalpies, and the pore filling mechanism using advanced in situ X-ray and neutron diffraction, NMR spectroscopy, and calorimetric techniques parallelised to adsorption for a series of six isoreticular networks. Aided by computational modelling, we identify DUT-50 as a new pressure amplifying material featuring distinct NGA transitions upon methane and argon adsorption. In situ neutron diffraction analysis of the methane (CD
Identifiants
pubmed: 31406113
doi: 10.1038/s41467-019-11565-3
pii: 10.1038/s41467-019-11565-3
pmc: PMC6690989
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
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