Three‐Dimensional Triptycene‐Functionalized Covalent Organic Frameworks with hea Net for Hydrogen Adsorption
Résumé
Owing to the confined building blocks and difficulty in structural identification, it remains a tremendous chal-lenge to directionally design and synthesize three-dimensional covalent organic frameworks (3D COFs) with predetermined topologies. Herein, we report the first two cases of 3D COFs with the hea topology, termed JUC-596 and JUC-597, by using the combination of tetrahedral and triangular prism building units. Due to the presence of triptycene functional group, JUC-596 exhibits an excep-tional performance in the H2 adsorption up to 356 cm3/g (or 3.18 wt%) at 77 K and 1 bar, which is higher than previ-ous benchmarks from porous materials reported so far, including porous carbon, metal-organic frameworks, amorphous porous polymers, and other COFs. Further-more, the strong interaction between H2 and COF materi-als is validated through the DFT theoretical calculation. This work represents a triumphant example of rational design of functional COFs based on a reticular chemistry guide and demonstrates its promising application in clean energy storage.
Domaines
Matériaux| Origine | Fichiers produits par l'(les) auteur(s) |
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