Covalent organic frameworks (COFs) are a class of crystalline porous polymers constructed by linking organic building units via covalent bonds. COFs solely constructed from light elements (H, B, C, N, and O), presenting features of low density, high stability, permanent porosity, large surface area, and designable functionality, have drawn increasing attention and showed promising potential in gas separation and purification. Herein, we reported a facile one-pot strategy to prepare COFs via an irreversible Suzuki coupling reaction followed by a reversible Schiff’s base reaction without the need for intermediate isolation. Gramscale ordered frameworks and rich porosities can be obtained by using diamino-aryl halide and dialdehyde aryl-borate compounds as monomers in one pot. The resultant microporous CR-COFs bearing three-level hierarchical porosity were used for efficient C2H4/C3H6 separation. This strategy reduces the waste generated and efforts consumed by stepwise reactions and relative purification processes, making the large-scale syntheses of stable COFs feasible. Moreover, it offers a novel modular approach to designing COF materials.

Syntheses of covalent organic frameworks via a one-pot Suzuki coupling and Schiff’s base reaction for C2H4/C3H6 separation

Where thousands of chemistry professionals meet to share ideas and advance scientific and technical knowledge. Spring 2023 abstracts, posters, and presentations will launch at the end of March.

ACS Spring 2023

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.