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

Qiang Zhu | Zendy; Xue Wang | Zendy; Rob Clowes | Zendy; Peng Cui | Zendy; Linjiang Chen | Zendy; Marc A. Little | Zendy; Andrew I. Cooper | Zendy

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

Author(s) -

Qiang Zhu,

Xue Wang,

Rob Clowes,

Peng Cui,

Linjiang Chen,

Marc A. Little,

Andrew I. Cooper

Publication year - 2020

Publication title -

journal of the american chemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 7.115

H-Index - 612

eISSN - 1520-5126

pISSN - 0002-7863

DOI - 10.1021/jacs.0c07732

Subject(s) - cage , chemistry , covalent bond , yield (engineering) , covalent organic framework , topology (electrical circuits) , molecule , prism , fullerene , node (physics) , nanotechnology , organic chemistry , combinatorics , composite material , optics , materials science , structural engineering , physics , mathematics , engineering

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-NH 2 ) 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 CO 2 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.

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