Journal
HELIYON
Volume 8, Issue 9, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.heliyon.2022.e10299
Keywords
Metal -organic frameworks; Water sorption; 2-periodic
Categories
Funding
- South African National Research Foundation [120849]
- University of Cape Town
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This paper reports the re-synthesis of a previously-reported two-periodic cadmium-based metal-organic framework CP1 and characterizes it using various techniques. The study shows that CP1 can be transformed into an amorphous product by heating to remove water molecules, and the original framework can be regenerated by re-adsorbing water, indicating the reversibility of the dehydration process.
A previously-reported cadmium-based two-periodic metal-organic framework [Cd-1.5(BTC)(H2O)(4.5)](n).nH(2)O (CP1) has been re-synthesized, where H3BTC = 1,3,5-benzenetricarboxylic acid. CP1 was characterized with single crystal X-ray diffraction (SCXRD), powder X-ray diffraction (PXRD) followed by various thermal analyses such as thermogravimetric analysis (TGA), hot stage microscopy (HSM) and differential scanning calorimetry (DSC). CP1 is composed of 2-periodic layers, which are interdigitated. Heating can effectively remove the uncoordinated and coordinated water molecules resulting in an amorphous product CP1 ' . The original framework can be regenerated by readsorption of water from the atmosphere, indicating that the dehydration is reversible.
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