Wen Fuxiang, Xu Kai, Feng Yaoqian, Huang Ning
State Key Laboratory of Silicon and Advanced Semiconductor Materials, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310058, China.
J Am Chem Soc. 2024 Jul 24;146(29):19680-19685. doi: 10.1021/jacs.4c06438. Epub 2024 Jul 9.
The pore shapes of two-dimensional covalent organic frameworks (2D COFs) significantly limit their practical applications in separation and catalysis. Although various 2D COFs with polygonal pores have been well developed, constructing COFs with pentagonal pores remains an enormous challenge. In this work, we developed one kind of pentagonal COFs with the topological structure for the first time, through the rational combination of and symmetric building blocks. The resulting pentagonal COFs exhibit high crystallinity, excellent porosity, and strong robustness. Moreover, the inbuilt porphyrin units render these COFs as efficient electrocatalytic catalysts toward oxygen reduction reaction with a half-wave potential of up to 0.81 V, which ranks as one of the highest values among COFs-based electrocatalysts. This work not only verified the possibility of constructing 2D COFs with pentagonal pores but also developed a strategy for the construction of functional 2D COFs for interesting applications.
二维共价有机框架（2D COFs）的孔形状极大地限制了它们在分离和催化方面的实际应用。尽管各种具有多边形孔的二维共价有机框架已得到充分发展，但构建具有五边形孔的共价有机框架仍然是一个巨大的挑战。在这项工作中，我们首次通过合理组合[具体内容缺失]和对称构建块，开发出一种具有拓扑结构的五边形共价有机框架。所得的五边形共价有机框架具有高结晶度、优异的孔隙率和很强的稳定性。此外，内置的卟啉单元使这些共价有机框架成为高效的氧还原反应电催化催化剂，其半波电位高达0.81 V，这在基于共价有机框架的电催化剂中是最高值之一。这项工作不仅验证了构建具有五边形孔的二维共价有机框架的可能性，还开发了一种构建功能性二维共价有机框架以用于有趣应用的策略。
