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Updated: Sep 14, 2026
Microfluidic-based Synthesis of Covalent Organic Frameworks (COFs): A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface
Published on: July 10, 2017
Two-Dimensional fes-Topology Covalent Organic Frameworks With Intrinsic Paramagnetic Semiconducting Properties
Kai Xu1, Yaoqian Feng1, Fuxiang Wen1
1State Key Laboratory of Silicon and Advanced Semiconductor Materials, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, China.
Abstract:
The structural diversity and periodic arrangement of two-dimensional (2D) covalent organic frameworks (COFs) endow them with great promise for electronic and magnetic functionalities. Nevertheless, magnetic functionalities in semiconducting 2D COFs are not easily attainable due to the scarcity of effective topology diagrams and building blocks. In this study, we designed and synthesized three examples of fes-topology COFs by rationally tessellating octagonal and rhombic pores using redox-active building blocks. The resulting fes-net COFs exhibit high crystallinity, excellent porosity, and well-resolved pore structures. Furthermore, the highly ordered orthogonal arrangement of the embedded redox-active units endows these fes-net COFs with electrical conductivities up to 10-2 S cm-1. In particular, Cu-BBFPP-TQTA-COF displayed enhanced paramagnetic properties attributed to the generated stable tetrathiafulvalene radical species. This work provides an effective design strategy for constructing octagonal fes-COFs and offers new insights into the development of semiconducting magnets.
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