Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 60, Issue 3, Pages 1290-1297Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202010783
Keywords
electrolytes; ionic liquids; long-range order; metal– organic frameworks (MOFs); proton conduction
Categories
Funding
- NSF of China [22071157, 21371123, 21773245, 21822109, 21975254, 21905280, 2020000052]
- NSF of Beijing Municipality [2172014]
- Capacity Building for Sci-Tech Innovation-Fundamental Scientific Research Funds
- Key Research Program of Frontier Sciences, CAS [QYZDB-SSW-SLH023]
- Strategic Priority Research Program of CAS [XDB20000000]
- International Partnership Program of CAS [121835KYSB201800]
- China Postdoctoral Science Foundation [2019M662254]
- Youth Innovation Promotion Association CAS
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By designing a reliable coordination self-assembly method, a crystalline IL for IL1MOF was successfully achieved. IL1MOF has a structure with long-range ordered arrangement and high ionic conductivity, maintaining high conductivity even in subzero temperatures as low as -150 degrees Celsius.
Arranging ionic liquids (ILs) with long-range order can not only enhance their performance in a desired application, but can also help elucidate the vital between structure and properties. However, this is still a challenge and no example has been reported to date. Herein, we report a feasible strategy to achieve a crystalline IL via coordination self-assembly based reticular chemistry. IL1MOF, was prepared by designing an IL bridging ligand and then connecting them with metal clusters. IL1MOF has a unique structure, where the IL ligands are arranged on a long-range ordered framework but have a labile ionic center. This structure enables IL1MOF to break through the typical limitation where the solid ILs have lower proton conductivity than their counterpart bulk ILs. IL1MOF shows 2-4 orders of magnitude higher proton conductivity than its counterpart IL monomer across a wide temperature range. Moreover, by confining the IL within ultramicropores (<1 nm), IL1MOF suppresses the liquid-solid phase transition temperatures to lower than -150 degrees C, allowing it to function with high conductivity in a subzero temperature range.
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