Three-Dimensional Covalent Organic Frameworks with jcg Topology Based on a Trinodal Strategy
Haorui Zheng1, Jie Ji1, Yusran Yusran1
1State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, P. R. China.
Journal of the American Chemical Society
|April 8, 2025
Summary
Researchers developed a new trinodal strategy for synthesizing 3D covalent organic frameworks (COFs) with tunable properties. This approach creates novel microporous and mesoporous nanochannels for advanced applications like photocatalysis.
Area of Science:
- Materials Science
- Nanotechnology
- Chemistry
Background:
- Three-dimensional (3D) covalent organic frameworks (COFs) offer significant application potential.
- Conventional uninodal or binodal design strategies limit the structural diversity of 3D COFs.
- Novel design strategies are needed to expand the structural complexity and functionality of COFs.
Purpose of the Study:
- To introduce a novel trinodal strategy for synthesizing 3D covalent organic frameworks (COFs).
- To create 3D COFs with both microporous and mesoporous nanochannels.
- To explore the potential of these COFs in photocatalytic hydrogen peroxide (H2O2) production.
Main Methods:
- Synthesis of 3D COFs using an 8-c building block with reduced symmetry and planar 4-c building blocks.
- Characterization using powder X-ray diffraction (PXRD), computational simulations, and high-resolution transmission electron microscopy (HR-TEM).
- Incorporation of pyrene and triphenylamine components to tune photophysical and electronic properties.
Main Results:
- Successful synthesis of unprecedented [4 + 3 + 4]-c jcg nets with unique saddle-shaped eight-membered rings and mirror-symmetrical chains.
- Demonstration of both microporous and mesoporous nanochannels within the synthesized COF structures.
- Tunable photophysical and electronic properties achieved through component incorporation and structural conjugation.
Conclusions:
- The trinodal strategy is effective in creating intricate 3D COF architectures with enhanced structural diversity.
- The synthesized COFs exhibit promising characteristics for heterogeneous photocatalysis, particularly for H2O2 production.
- This work opens new avenues for designing advanced functional materials based on complex COF structures.
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