Ester-Linked Crystalline Covalent Organic Frameworks.
- Author(s): Zhao, Chenfei
- Lyu, Hao
- Ji, Zhe
- Zhu, Chenhui
- Yaghi, Omar M
- et al.
Published Web Locationhttps://doi.org/10.1021/jacs.0c07015
Ester-linked, crystalline, porous covalent organic frameworks (COFs) have been synthesized and structurally characterized. Transesterification reactions between ditopic 2-pyridinyl aromatic carboxylates and tri- or tetratopic phenols gave the corresponding ester-linked COFs. They crystallize as 2D structures in kgm (COF-119) and hcb (COF-120, 121, 122) topologies with surface areas of up to 2092 m2/g. Notably, crystalline COF-122 comprises edges spanning over 10 phenylene units, an aspect that had only been achieved in metal-organic frameworks. This work expands the scope of reticular chemistry to include, for the first time, crystalline ester-linked COFs related to common polyesters.