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

Qiang Zhu, Xue Wang, Rob Clowes, Peng Cui, Linjiang Chen*, Marc a. Little*, Andrew I. Cooper*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

164 Citations (Scopus)

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.
Original languageEnglish
Pages (from-to)16842-16848
Number of pages7
JournalJournal of the American Chemical Society
Volume142
Issue number39
DOIs
Publication statusPublished - 6 Sept 2020

Keywords

  • porous materials
  • covalent organic frameworks
  • computational modelling
  • chemical structure
  • group theory
  • mathematical methods
  • physical and chemical processes

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