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Two solvent-induced variable host–guest two-dimensional binary frameworks mediated by hydrogen bonding

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Abstract

Two-dimensional binary hydrogen-bonded organic frameworks constructed from 1,3,5-benzenetricarboxylic acid (TMA) and 4,4′-biphenyldicarboxylic acid (BDA) on highly oriented pyrolytic graphite (HOPG) were investigated by scanning tunneling microscopy (STM) in heptanoic acid and octanoic acid solvents. High-resolution STM observations demonstrated that various assemblies of hydrogen-bonded networks are strongly dependent on the nature of the solvent. Well-ordered porous rectangular flowerlike networks were revealed at the heptanoic acid/HOPG interface, whereas two different coexisting densely packed guest–host BDA/TMA structures were observed at the octanoic acid/HOPG interface. It is suggested that the stabilization of the binary networks is possibly associated with the solvent chain length, and longer-chain solvents favored the formation of porous polymorphic networks.

Graphical abstract: Two solvent-induced variable host–guest two-dimensional binary frameworks mediated by hydrogen bonding

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Publication details

The article was received on 12 Mar 2019, accepted on 05 Apr 2019 and first published on 08 Apr 2019


Article type: Paper
DOI: 10.1039/C9CP01395D
Citation: Phys. Chem. Chem. Phys., 2019, Advance Article

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    Two solvent-induced variable host–guest two-dimensional binary frameworks mediated by hydrogen bonding

    W. Li, S. Qiu, C. Xu, J. Hu and X. Chen, Phys. Chem. Chem. Phys., 2019, Advance Article , DOI: 10.1039/C9CP01395D

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