Three‐Dimensional Triptycene‐Functionalized Covalent Organic Frameworks with hea Net for Hydrogen Adsorption

Chengyang Yu (1) , Hui Li (1) , Yujie Wang (1) , Jinquan Suo (1) , Xinyu Guan (1) , Rui Wang (1) , Valentin Valtchev (2) , Yushan Yan (3) , Shilun Qiu (1) , Qianrong Fang (1)

1 JLU - Jilin University
2 LCS - Laboratoire catalyse et spectrochimie
3 University of Delaware [Newark]

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

Chengyang Yu, Hui Li, Yujie Wang, Jinquan Suo, Xinyu Guan, et al.. Three‐Dimensional Triptycene‐Functionalized Covalent Organic Frameworks with hea Net for Hydrogen Adsorption. Angewandte Chemie International Edition, 2022, 61 (13), pp.e202117101. ⟨10.1002/anie.202117101⟩. ⟨hal-03603188⟩