3D Cage COFs: A Dynamic Three-Dimensional Covalent Organic Framework with High-Connectivity Organic Cage Nodes.



Zhu, Qiang, Wang, Xue, Clowes, Rob, Cui, Peng, Chen, Linjiang, Little, Marc A and Cooper, Andrew I
(2020) 3D Cage COFs: A Dynamic Three-Dimensional Covalent Organic Framework with High-Connectivity Organic Cage Nodes. Journal of the American Chemical Society.

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Abstract

Three-dimensional (3D) covalent organic frameworks (COFs) are rare because there is a limited choice of organic building blocks that offer multiple reactive sites in a polyhedral geometry. Here, we synthesized an organic cage molecule (Cage-6-NH2) that was used as a triangular prism node to yield the first cage-based 3D COF, 3D-CageCOF-1. This COF adopts an unreported 2-fold interpenetrated acs topology and exhibits reversible dynamic behavior, switching between a small-pore (sp) structure and a large-pore (lp) structure. It also shows high CO2 uptake and captures water at low humidity (<40%). This demonstrates the potential for expanding the structural complexity of 3D COFs by using organic cages as the building units.

Item Type: Article
Depositing User: Symplectic Admin
Date Deposited: 14 Sep 2020 10:46
Last Modified: 09 Nov 2021 09:51
DOI: 10.1021/jacs.0c07732
Open Access URL: https://doi.org/10.1021/jacs.0c07732
URI: https://livrepository.liverpool.ac.uk/id/eprint/3101137