Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 60, Issue 38, Pages 20915-20920Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202107156
Keywords
CO2 adsorption; cycloaddition reactions; ionic liquids; metal-organic frameworks; porous liquids
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Funding
- National Key Research and Development Program of China [2018YFA0208600, 2018YFA0704502]
- NSFC [22071245, 21871263, 22033008]
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China [2021ZZ103]
- Youth Innovation Promotion Association, CAS [Y201850]
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This study presents a new strategy for fabricating porous MOF liquids with permanent porosity and fluidity, which have significantly increased CO2 adsorption capacity and can be used for synthesizing cyclic carbonates.
The unique applications of porous metal-organic framework (MOF) liquids with permanent porosity and fluidity have attracted significant attention. However, fabrication of porous MOF liquids remains challenging because of the easy intermolecular self-filling of the cavity or the rapid settlement of porous hosts in hindered solvents that cannot enter their pores. Herein, we report a facile strategy for the fabrication of a MOF liquid (Im-UiO-PL) by surface ionization of an imidazolium-functionalized framework with a sterically hindered poly(ethylene glycol) sulfonate (PEGS) canopy. The Im-UiO-PL obtained in this way has a CO2 adsorption approximately 14 times larger than that of pure PEGS. Distinct from a porous MOF solid counterpart, the stored CO2 in Im-UiO-PL can be slowly released and efficiently utilized to synthesize cyclic carbonates in the atmosphere. This is the first example of the use of a porous MOF liquid as a CO2 storage material for catalysis. It offers a new method for the fabrication of unique porous liquid MOFs with functional behaviors in various fields of gas adsorption and catalysis.
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