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Regulating the topology of 2D covalent organic frameworks by the rational introduction of substituents

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Abstract

The topology of a covalent organic framework (COF) is generally believed to be dictated by the symmetries of the monomers used for the condensation reaction. In this context, the use of monomers with different symmetries is usually required to afford COFs with different topologies. Herein, we report a conceptual strategy to regulate the topology of 2D COFs by introducing alkyl substituents into the skeleton of a parent monomer. The resulting monomers, sharing the same C2 symmetry, were assembled with a D2h symmetric tetraamine to generate a dual-pore COF or single-pore COFs, depending on the sizes of the substituents, which were evidenced using PXRD studies and pore size distribution analyses. These results demonstrate that the substituent is able to exert a significant influence on the topology of COFs, which is crucial for their application.

Graphical abstract: Regulating the topology of 2D covalent organic frameworks by the rational introduction of substituents

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Publication details

The article was received on 26 Dec 2016, accepted on 13 Mar 2017 and first published on 14 Mar 2017


Article type: Edge Article
DOI: 10.1039/C6SC05673C
Citation: Chem. Sci., 2017, Advance Article
  • Open access: Creative Commons BY-NC license
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    Regulating the topology of 2D covalent organic frameworks by the rational introduction of substituents

    Z. Pang, T. Zhou, R. Liang, Q. Qi and X. Zhao, Chem. Sci., 2017, Advance Article , DOI: 10.1039/C6SC05673C

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