Three‐Dimensional Triptycene‐Functionalized Covalent Organic Frameworks with hea Net for Hydrogen Adsorption
Chengyang Yu, Hui Li, Yujie Wang, Jinqun Suo, Xinyu Guan, Rui Wang, Valentin Valtchev, Yushan Yan, Shilun Qiu, Qianrong Fang
Abstract
Abstract Owing to the finite building blocks and difficulty in structural identification, it remains a tremendous challenge to elaborately 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 non‐interpenetrated hea net, termed JUC‐596 and JUC‐597, by using the combination of tetrahedral and triangular prism building units. Due to the presence of triptycene functional groups and fluorine atoms, JUC‐596 exhibits an exceptional performance in the H 2 adsorption up to 305 cm 3 g −1 (or 2.72 wt%) at 77 K and 1 bar, which is higher than previous benchmarks from porous organic materials reported so far. Furthermore, the strong interaction between H 2 and COF materials is verified through the DFT theoretical calculations. This work represents a captivating example of rational design of functional COFs based on a reticular chemistry guide and demonstrates its promising application in clean energy storage.