Tu Jing, Song Wen, Chen Bo, Li Yusen, Chen Long
Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou, 313001, China.
Key Laboratory for Special Functional Materials of Ministry of Education, National and Local Joint Engineering Research Center for, High-Efficiency Display and Lighting Technology, School of Materials Science and Engineering, and, Collaborative Innovation Center of, Nano Functional Materials and Applications, Henan University, Kaifeng, 475004, China.
Chemistry. 2023 Nov 24;29(66):e202302380. doi: 10.1002/chem.202302380. Epub 2023 Oct 18.
2D covalent organic frameworks with Kagome (kgm) topology are a promising class of crystalline frameworks that possess both triangular and hexagonal pores. These dual-pore structures enable kgm COFs to exhibit unique advantages in selective separation, mass transfer, and targeted drug release. However, the synthesis of 2D kgm COFs has been hindered by the reliance on empirical methods. This review systematically summarizes the conventional macrocycle-to-framework strategy, typical [4+2] co-polymerization synthetic strategy, and bifunctional molecules self-condensation approach for constructing 2D kgm COFs. Factors influencing the formation of kgm lattice are surveyed, such as monomer type, solvent polarity, substrate concentration, etc., and highlight the representative examples on targeted synthesis. Additionally, applications of 2D kgm COFs and relationships between structure and performances are summarized. Finally, key fundamental perspectives are proposed to accelerate the further development of this intriguing material.
具有 Kagome（kgm）拓扑结构的二维共价有机框架是一类很有前景的晶体框架，具有三角形和六边形孔隙。这些双孔结构使 kgm 共价有机框架在选择性分离、传质和靶向药物释放方面展现出独特优势。然而，二维 kgm 共价有机框架的合成一直受到对经验方法依赖的阻碍。本综述系统总结了用于构建二维 kgm 共价有机框架的传统大环到框架策略、典型的[4+2]共聚合成策略和双功能分子自缩合方法。研究了影响 kgm 晶格形成的因素，如单体类型、溶剂极性、底物浓度等，并重点介绍了靶向合成的代表性实例。此外，总结了二维 kgm 共价有机框架的应用以及结构与性能之间的关系。最后，提出了关键的基础观点，以加速这种有趣材料的进一步发展。
