Kumawat, LK, Wynne, C, Cappello, E, Fisher, P, Brennan, LE, Strofaldi, A, McManus, JJ, Hawes, CS, Jolliffe, KA, Gunnlaugsson, T and Elmes, RBP (2021) Squaramide-Based Self-Associating Amphiphiles for Anion Recognition. Chempluschem, 86 (8). 1058 - 1068. ISSN 2192-6506

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The synthesis and characterisation of two novel self-assembled amphiphiles (SSAs) SQS-1 and SQS-2 are reported. Both compounds, based on the squaramide motif, were fully soluble in a range of solvents and were shown to undergo self-assembly through a range of physical techniques. Self-assembly was shown to favour the formation of crystalline domains on the nanoscale but also fibrillar film formation, as suggested by SEM analysis. Moreover, both SQS-1 and SQS-2 were capable of anion recognition in DMSO solution as demonstrated using 1 H NMR and UV/Vis absorption spectroscopy, but displayed lower binding affinities for various anions when compared against other squaramide based receptors. In more competitive solvent mixtures SQS-1 gave rise to a colourimetric response in the presence of HPO4 2- that was clearly visible to the naked eye. We anticipate that the observed response is due to the basic nature of the HPO4 2- anion when compared against other biologically relevant anions.

Item Type: Article
Additional Information: © 2021 The Authors. ChemPlusChem published by Wiley-VCH GmbH. This isan open access article under the terms of the Creative Commons AttributionNon-Commercial NoDerivs License, which permits use and distribution inany medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.
Uncontrolled Keywords: anion recognition; colorimetric sensors; self-assembly; squaramides; supramolecular chemistry
Subjects: Q Science > Q Science (General)
Q Science > QD Chemistry
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Depositing User: Symplectic
Date Deposited: 19 Nov 2021 11:20
Last Modified: 29 Nov 2021 13:32
URI: https://eprints.keele.ac.uk/id/eprint/10295

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