Permanent cavities in ionic liquids created by metal-organic polyhedra

As an emerging type of material, porous liquids combine the fluidity of liquids with the permanent porosity of porous solids, which makes them promising for various applications. Despite several significant attempts earlier, the porous liquid system still requires the novel entries of porous hosts a...

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Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2022-08, Vol.1 (3), p.1624-16211
Main Authors: Dinker, Manish Kumar, Zhao, Kan, Liu, Song, Qi, Shi-Chao, Li, Yu-Xia, Liu, Gong-Ping, Ding, Lifeng, Liu, Xiao-Qin, Sun, Lin-Bing
Format: Article
Language:English
Subjects:
Carbon dioxide
Cavities
Chemical bonds
Durability
Fluidity
Ionic liquids
Ions
Liquid membranes
Polyethylene glycol
Polyhedra
Porosity
Porous materials
Thermal stability
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Summary:As an emerging type of material, porous liquids combine the fluidity of liquids with the permanent porosity of porous solids, which makes them promising for various applications. Despite several significant attempts earlier, the porous liquid system still requires the novel entries of porous hosts and bulky liquids. Here, we report a new porous liquid system based on the coalition of metal-organic polyhedra and well-designed bulky ionic liquids. As a proof of concept, the typical metal-organic polyhedra, Pd 12 L 24 where L represents the ligands, are employed as porous hosts. Also, a polyethylene glycol-linked bis-imidazolium-based bulky ionic liquid with a molecular size larger than the pore aperture of Pd 12 L 24 is designed as a solvent, yielding type II porous ionic liquids. These liquid materials possessing permanent cavities, good thermal stability and long-term durability have captured high CO 2 compared to neat ionic liquids. Besides, they are found separating CO 2 from N 2 and CH 4 molecules not only as an entity but also as supported porous liquid membranes. We expect that the present strategy can be used to construct other porous liquids with specific functionality for additional applications. A new porous liquid system based on the coalition of MOPs and bulky IL was designed. The liquid materials exhibit permanent cavities, long-term durability, and good ability to separate CO 2 from N 2 and CH 4 not only as an entity but also as a membrane.
ISSN:2050-7488
2050-7496
DOI:10.1039/d2ta02860c