Three-Dimensional Covalent Organic Frameworks with she Topology.
Xiaoyi Xu1, Peiyu Cai2, Hongzheng Chen1
1MOE Key Laboratory of Macromolecular Synthesis and Functionalization, State Key Laboratory of Silicon Materials, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China.
Journal of the American Chemical Society
|September 28, 2022
Summary
Researchers developed novel 3D covalent organic frameworks (COFs) with a unique she topology. These porous COFs demonstrate high stability and catalyze important C-C bond forming and CO2 reduction reactions.
Area of Science:
- Materials Science
- Chemistry
- Nanotechnology
Background:
- Reticular chemistry enables precise control over crystalline framework structures.
- The diversity of three-dimensional (3D) covalent organic frameworks (COFs) with established topological structures remains limited.
Purpose of the Study:
- To develop novel 3D COFs with an unprecedented she topology.
- To explore the catalytic applications of these newly synthesized COFs.
Main Methods:
- Synthesis of 3D COFs using D- and D-symmetric building blocks.
- Characterization of crystalline structures, composition, and physicochemical properties.
- Evaluation of catalytic activity in photoredox C-C bond formation and CO2 reduction.
Main Results:
- Successfully constructed 3D COFs featuring the she topology, crystallizing in the Im3̅m space group.
- The resulting noninterpenetrated networks possess uniform 2.0 nm pores and exhibit high crystallinity, porosity, and stability.
- The porphyrin-containing COFs demonstrated efficiency as catalysts for photoredox C-C bond forming and photocatalytic CO2 reduction.
Conclusions:
- This work presents a new strategy for constructing 3D she-net COFs, expanding the structural diversity of COFs.
- The developed COFs show significant potential as advanced materials for catalysis, particularly in C-C bond formation and CO2 utilization.
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