Three-dimensional microporous and mesoporous covalent organic frameworks based on cubic building units
Li Liao1, Xinyu Guan1, Haorui Zheng1
1State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University Changchun 130012 P. R. China postlh@jlu.edu.cn xdyao@jlu.edu.cn qrfang@jlu.edu.cn.
Chemical Science
|September 12, 2022
Summary
Researchers developed novel cubic building units for covalent organic frameworks (COFs), creating JUC-588 and JUC-589. These materials exhibit tunable porosity and high stability for gas adsorption and dye removal.
Area of Science:
- Materials Science
- Chemistry
Background:
- Covalent organic frameworks (COFs) are gaining attention for their diverse applications.
- Limited structural diversity in COFs hinders material development.
Purpose of the Study:
- To introduce novel cubic building units for creating new 3D imine-linked COFs.
- To achieve tunable porosity and enhanced properties in COFs.
Main Methods:
- Synthesis of two unusual cubic (8-connected) building units.
- Construction of 3D imine-linked COFs with bcu nets (JUC-588 and JUC-589).
- Characterization of pore structures, surface areas, and stability.
Main Results:
- Successfully synthesized JUC-588 and JUC-589 with bcu topology.
- Achieved tunable microporous and mesoporous structures with high surface areas (2728 m² g⁻¹ and 2482 m² g⁻¹).
- Demonstrated high CO₂/N₂ and CO₂/CH₄ selectivity, excellent H₂ uptake, and efficient dye adsorption.
Conclusions:
- The study presents a general strategy for designing stable 3D COF architectures with adjustable pores.
- Improving the valency of rigid building blocks is key to enhancing COF properties.
- The developed COFs show significant potential in gas separation and environmental remediation.
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