Three-Dimensional Large-Pore Covalent Organic Framework with stp Topology
Hui Li1, Jiehua Ding1, Xinyu Guan1
1State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, P. R. China.
Journal of the American Chemical Society
|July 18, 2020
Summary
Researchers created a new 3D covalent organic framework (COF) with a record-breaking large pore size. This advanced material, JUC-564, shows potential for adsorbing and separating large biological molecules.
Area of Science:
- Materials Science
- Polymer Chemistry
- Nanotechnology
Background:
- Three-dimensional covalent organic frameworks (3D COFs) are crystalline porous polymers with diverse applications.
- Existing 3D COFs have limitations in building units and topological structures.
- Developing novel 3D COFs with tailored properties is crucial for expanding their utility.
Purpose of the Study:
- To design and synthesize a novel 3D COF with an unprecedented large pore size and specific topology.
- To explore the potential applications of this new COF in adsorption and separation of large molecules.
Main Methods:
- Utilized a symmetry-guided design principle.
- Synthesized a 6-connected triptycene-based monomer.
- Constructed a 3D COF with the stp topology (JUC-564).
- Characterized the COF's surface area, pore size, and density.
- Confirmed pore size by incorporating a protein.
Main Results:
- Successfully synthesized JUC-564, the first 3D COF with stp topology from a triptycene monomer.
- Achieved a high specific surface area of up to 3300 m² g⁻¹.
- Obtained the largest pore size (43 Å) among known 3D COFs.
- Reported a record-low density of 0.108 g cm⁻³ for crystalline materials.
- Demonstrated JUC-564's capability to incorporate a protein, confirming its large pore size.
Conclusions:
- The study expands the structural diversity of 3D COFs through rational design.
- JUC-564 offers significant potential for the adsorption and separation of large biological molecules.
- The findings pave the way for new applications of 3D COFs in biotechnology and materials science.
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