Single-Crystal One-Dimensional Porous Ladder Covalent Polymers

作者：Yi Yang, En Lin, Sa Wang, Ting Wang, Zhifang Wang, Zhenjie Zhang · 发表于：Journal of the American Chemical Society · 年份：2024 · DOI：10.1021/jacs.3c10812 · 被引用次数：39 · 研究领域：Covalent Organic Framework Applications、Metal-Organic Frameworks: Synthesis and Applications、Advanced Photocatalysis Techniques

The synthesis of single-crystal, one-dimensional (1D) polymers is of great importance but a formidable challenge. Herein, we report the synthesis of single-crystal 1D ladder polymers in solution by dynamic covalent chemistry. The three-dimensional electron diffraction technique was used to rigorously solve the structure of the crystalline polymers, unveiling that each polymer chain is connected by double covalent bridges and all polymer chains are packed in a staggered and interlaced manner by π–π stacking and hydrogen bonding interactions, making the crystalline polymers highly robust in both thermal and chemical stability. The synthesized single-crystal polymers possess permanent micropores and can efficiently remove CO 2 from the C 2 H 2 /CO 2 mixture to obtain high-purity C 2 H 2, validated by dynamic breakthrough experiments. This work demonstrates the first example of constructing single-crystal 1D porous ladder polymers with double covalent bridges in solution for efficient C 2 H 2 /CO 2 separation.