Molecules 2017, 22(12), 2273; https://doi.org/10.3390/molecules22122273
Modulation of the Selectivity in Anions Recognition Processes by Combining Hydrogen- and Halogen-Bonding Interactions
Dto de Química Orgánica, Universidad de Murcia, Campus de Espinardo, E-30100 Murcia, Spain
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Received: 17 November 2017 / Revised: 11 December 2017 / Accepted: 18 December 2017 / Published: 20 December 2017
(This article belongs to the Special Issue Halogen Bonds and Beyond)
Abstract
Most of the halogen bonding receptors for anions described use halogen bonding binding sites solely in the anion recognition process; only a few examples report the study of anion receptors in which the halogen bonding interaction has been used in combination with any other non-covalent interaction. With the aims to extend the knowledge in the behaviour of this kind of mixed receptors, we report here the synthesis and the anion recognition and sensing properties of a new halogen- and hydrogen- bonding receptor which binds anions by the cooperation of both non-covalent interactions. Fluorescence studies showed that the behaviour observed in the anion recognition sensing is similar to the one previously described for the halogen analogue and is quite different to the hydrogen one. On the other hand, the association constants obtained by 1H-NMR data demonstrate that the mixed halogen- and hydrogen-bonding receptor is more selective for SO42− anion than the halogen or hydrogen analogues. View Full-TextKeywords:
halogen-bonding; hydrogen-bonding; anion; fluorescence; imidazolium; recognition; sensing
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Zapata, F.; Benítez-Benítez, S.J.; Sabater, P.; Caballero, A.; Molina, P. Modulation of the Selectivity in Anions Recognition Processes by Combining Hydrogen- and Halogen-Bonding Interactions. Molecules 2017, 22, 2273.
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