近日，香港城市大学张其春团队研究了共价有机聚合物链交织成二维网络：合成、单晶结构及其在稳定锂金属阳极中的应用。这一研究成果于2025年5月5日发表在国际顶尖学术期刊《德国应用化学》上。

几千年来，宏观织造已被证明是制造满足人类实际需求的织物的最持久和最有效的方法。然而，基于分子编织构建具有精细拓扑结构和特定性质的分子结构仍处于起步阶段。研究组设计并制造了一个二维（2D）编织共价有机聚合物（COP）网络（名为CityU-46），由动态N驱动→B键连接1,4-双（苯并二氧杂硼）苯（BACT）和2,5-双（4-吡啶基）-1,3,4-噻二唑（BPT）。

使用单晶X射线衍射技术确定了CityU-46的复杂编织拓扑结构，揭示了它在分子水平上具有明确的二上二下交织图案。由于其结构优点，CityU-46可用作锂金属阳极表面的人工有机固体电解质界面层，显著提高了锂金属电池的稳定性和长期性能。

附：英文原文

Title: Interweaving Covalent Organic Polymer Chains into Two-Dimensional Networks: Synthesis, Single Crystal Structure and Application for Stabilizing Lithium Metal Anode

Author: Lizhong He, Tuoya Naren, Lei Zhang, Fangyuan Kang, Jinglun Yang, Zihao Chen, Aimin Yu, Dong-Sheng Li, Libao Chen, Qichun Zhang

Issue&Volume: 2025-05-05

Abstract: Macroscopic weaving has been proven to be the most enduring and effective method for manufacturing fabrics to meet the practical needs of humanity for thousands of years. However, the construction of molecular structures with exquisite topologies and specific properties based on molecular weaving is still in its infancy. Herein, we designed and fabricated a two-dimensional (2D) woven covalent organic polymer (COP) network (named as CityU-46) driven by the dative N→B bonds between the 1,4-bis(benzodioxa-borole)benzene (BACT) and 2,5-bis(4-pyridyl)-1,3,4-thiadiazole (BPT). The complex woven topology of CityU-46 was determined using single crystal X-ray diffraction technique, revealing that it features a well-defined two-over and two-under interweaving pattern at the molecular level. Due to its structural merits, CityU-46 can be used as an artificial organic solid-electrolyte interphase layer on the surface of Li metal anodes, significantly improving the stability and long-term performance of lithium metal cells.

DOI: 10.1002/anie.202506036

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202506036