Issue 4, 2017

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

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

Supplementary files

Article information

Article type
Edge Article
Submitted
14 Sun 2017
Accepted
03 Yan 2017
First published
16 Yan 2017
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY-NC license

Chem. Sci., 2017,8, 3019-3025

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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