Gating Effects for Ion Transport in Three-Dimensional Functionalized Covalent Organic Frameworks
Xiuqin Yu1, Cuiyan Li1, Jianhong Chang1
1State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun, 130012, China.
Angewandte Chemie (International Ed. in English)
|January 24, 2022
Summary
Researchers developed novel functionalized covalent organic frameworks (COFs) for precise ion transport control. These bioinspired nanochannels show high selectivity and gating, activated by lithium ions.
Area of Science:
- Materials Science
- Nanotechnology
- Supramolecular Chemistry
Background:
- Developing bioinspired nano/subnano-sized (<2 nm) ion channels is challenging due to difficulties in controlling pore structure and chemistry.
- Existing solid-state nanochannels often lack precise control over ion transport modulation.
Purpose of the Study:
- To report the development of three-dimensional functionalized covalent organic frameworks (COFs) as an intelligent nanofluidic platform.
- To demonstrate the use of COFs for the intelligent modulation of ion transport.
- To investigate the ion-gating capabilities activated by specific ions.
Main Methods:
- Synthesized three-dimensional functionalized covalent organic frameworks (COFs).
- Strategically attached 12-crown-4 groups to monomers, acting as ion-driver door locks.
- Investigated ion transport and gating effects using experimental and simulated studies.
Main Results:
- Demonstrated that functionalized COFs can act as an effective nanofluidic platform for intelligent ion transport modulation.
- Achieved lithium ion-activated gating effects in the functionalized COFs.
- Observed outstanding selective ion transmission with a high gating ratio (up to 23.6 for JUC-590), among the highest reported for metal ion-activated solid-state nanochannels.
Conclusions:
- Functionalized COFs provide a promising platform for advanced nanofluidic applications.
- The developed JUC-590 material exhibits high tunability, selectivity, and recyclability for ion transport.
- This work represents a significant advancement in the design of responsive solid-state nanochannels.
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