3D cage COFs: A dynamic three-dimensional covalent organic framework with high-connectivity organic cage nodes

DOI: 10.1021/jacs.0c07732

Authors: Qiang Zhu (University of Liverpool) , Xue Wang (University of Liverpool) , Rob Clowes (University of Liverpool) , Peng Cui (University of Liverpool) , Linjiang Chen (University of Liverpool) , Marc Little (University of Liverpool) , Andrew I. Cooper (University of Liverpool)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of The American Chemical Society

State: Published (Approved)
Published: September 2020
Diamond Proposal Number(s): 21726 , 23666

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), which was used as a triangular prism node to yield the first cage-based 3D COF, 3D-CageCOF-1. This COF adopts an unreported twofold 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.

Subject Areas: Chemistry, Materials


Instruments: I11-High Resolution Powder Diffraction , I19-Small Molecule Single Crystal Diffraction

Added On: 14/09/2020 15:56

Discipline Tags:

Chemistry Materials Science Organic Chemistry

Technical Tags:

Diffraction Single Crystal X-ray Diffraction (SXRD) X-ray Powder Diffraction