A Cubic 3D Covalent Organic Framework with nbo Topology

Xue Wang, Mounib Bahri, Zhiwei Fu, Marc A. Little, Lunjie Liu, Hongjun Niu, Nigel D. Browning, Samantha Y. Chong, Linjiang Chen, John W. Ward, Andrew I. Cooper*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

77 Citations (Scopus)
17 Downloads (Pure)


The synthesis of three-dimensional (3D) covalent organic frameworks (COFs) requires high-connectivity polyhedral building blocks or the controlled alignment of building blocks. Here, we use the latter strategy to assemble square-planar cobalt(II) phthalocyanine (PcCo) units into the nbo topology by using tetrahedral spiroborate (SPB) linkages that were chosen to provide the necessary 90° dihedral angles between neighboring PcCo units. This yields a porous 3D COF, SPB-COF-DBA, with a noninterpenetrated nbo topology. SPB-COF-DBA shows high crystallinity and long-range order, with 11 resolved diffraction peaks in the experimental powder X-ray diffraction (PXRD) pattern. This well-ordered crystal lattice can also be imaged by using high-resolution transmission electron microscopy (HR-TEM). SPB-COF-DBA has cubic pores and exhibits permanent porosity with a Brunauer–Emmett–Teller (BET) surface area of 1726 m2 g–1.
Original languageEnglish
Pages (from-to)15011-15016
Number of pages6
JournalJournal of the American Chemical Society
Issue number37
Early online date13 Sept 2021
Publication statusPublished - 22 Sept 2021

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry


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