Topological Isomerism in Three-Dimensional Covalent Organic Frameworks

• DOI: 10.1021/jacs.3c01070
• Publication Date: 2023-04-19T01:56:18Z
• Authors: Yaozu Liu; Jingwei Li; Jia Lv; Zitao Wang; Jinquan Suo; Junxia Ren; Jianchuan Liu; Dong Liu; Yujie Wang; Valentin Valtchev; Shilun Qiu; Daliang Zhang; Qianrong Fang
• Keywords: Covalent organic framework

Although isomerism is a typical and significant phenomenon in organic chemistry, it rarely found covalent framework (COF) materials. Herein, for the first time, we report controllable synthesis of topological isomers three-dimensional COFs via distinctive tetrahedral building unit under different solvents. Based on this strategy, both with dia or qtz net (termed JUC-620 JUC-621) have been obtained, their structures are determined by combining powder X-ray diffraction transmission electron microscopy. Remarkably, these architectures show distinct difference porous features; example, JUC-621 exhibits permanent mesopores (up to ∼23 Å) high surface area (∼2060 m2 g-1), which far surpasses those (pore size ∼12 Å 980 g-1). Furthermore, mesoporous can remove dye molecules efficiently achieves excellent iodine adsorption 6.7 g 2.3 times that microporous (∼2.9 This work thus provides new way constructing COF promotes structural diversity promising applications