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Issue 4, 2017
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Supramolecular anion recognition in water: synthesis of hydrogen-bonded supramolecular frameworks

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Abstract

The interaction of tetratopic amidinium-containing receptors with terephthalate anions leads to porous framework materials assembled through charge-assisted hydrogen bonds. The frameworks form in good yield within minutes in water at room temperature, but no framework material is obtained if other anions (Cl, Br, NO3, SO42− or isophthalate2−) are used in place of terephthalate. Two forms of the framework can be prepared: one with a connected pore network, and a more dense phase with discrete voids. We demonstrate that these are the kinetic and thermodynamic products, respectively. Either framework can be prepared independently and can be converted to the other form in response to stimuli. Furthermore, the frameworks can be controllably disassembled and reassembled in response to acid/base triggers suggesting that this new class of materials may have applications in the selective encapsulation and release of guests.

Graphical abstract: Supramolecular anion recognition in water: synthesis of hydrogen-bonded supramolecular frameworks

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Publication details

The article was received on 14 Jan 2017, accepted on 03 Feb 2017 and first published on 16 Feb 2017


Article type: Edge Article
DOI: 10.1039/C7SC00201G
Citation: Chem. Sci., 2017,8, 3019-3025
  • Open access: Creative Commons BY-NC license
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    Supramolecular anion recognition in water: synthesis of hydrogen-bonded supramolecular frameworks

    M. Morshedi, M. Thomas, A. Tarzia, C. J. Doonan and N. G. White, Chem. Sci., 2017, 8, 3019
    DOI: 10.1039/C7SC00201G

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