Solvent‐Directed in Situ Stacking Modulation of 2D Covalent Organic Frameworks for Selective Separation of Xylene Isomers

作者：Xuhan Zheng, Hui Liu, Jialin Cui, Yuman Guo, Hongze Xu, Zejun Zhang, Jianming Zhang, Yingjie Zhao · 发表于：Angewandte Chemie International Edition · 年份：2025 · DOI：10.1002/anie.202519150 · 被引用次数：6 · 研究领域：Covalent Organic Framework Applications、Surface Chemistry and Catalysis、Pickering emulsions and particle stabilization

The precise regularity of stacking modes in two-dimensional covalent organic frameworks (2D COFs) remains insufficiently understood, and achieving precise control during synthesis is highly challenging. Here, we show that the interlayer stacking arrangement can be in situ modulated simply by varying the reaction solvent, allowing the selective formation of either eclipsed (AA) or staggered (AB) stacking. This direct solvent-driven regulation, achieved without post-synthetic modification, underscores the dynamic nature of COF assembly. Notably, the AA-stacked COF exhibits promising separation performance for xylene isomers compared to its AB-stacked counterpart.