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Langton MJ, Marques I, Robinson SW, et al. Iodide Recognition and Sensing in Water by a Halogen-Bonding Ruthenium(II)-Based Rotaxane. Chemistry. 2015;22(1):185-92doi: 10.1002/chem.201504018.
Langton, M. J., Marques, I., Robinson, S. W., Félix, V., & Beer, P. D. (2016). Iodide Recognition and Sensing in Water by a Halogen-Bonding Ruthenium(II)-Based Rotaxane. Chemistry (Weinheim an der Bergstrasse, Germany), 22(1), 185-92. https://doi.org/10.1002/chem.201504018
Langton, Matthew J, et al. "Iodide Recognition and Sensing in Water by a Halogen-Bonding Ruthenium(II)-Based Rotaxane." Chemistry (Weinheim an der Bergstrasse, Germany) vol. 22,1 (2016): 185-92. doi: https://doi.org/10.1002/chem.201504018
Langton MJ, Marques I, Robinson SW, Félix V, Beer PD. Iodide Recognition and Sensing in Water by a Halogen-Bonding Ruthenium(II)-Based Rotaxane. Chemistry. 2016 Jan 04;22(1):185-92. doi: 10.1002/chem.201504018. Epub 2015 Dec 02. PMID: 26626866; PMCID: PMC4832824.
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Chemistry. 2016 Jan 04;22(1):185-92. doi: 10.1002/chem.201504018. Epub 2015 Dec 02.

Iodide Recognition and Sensing in Water by a Halogen-Bonding Ruthenium(II)-Based Rotaxane.

Chemistry (Weinheim an der Bergstrasse, Germany)

Matthew J Langton, Igor Marques, Sean W Robinson, Vítor Félix, Paul D Beer

Affiliations

  1. Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford OX1 3TA (UK).
  2. Departamento de Química, iBiMED and CICECO, Universidade de Aveiro, 3810-193 Aveiro (Portugal).
  3. Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford OX1 3TA (UK). [email protected].

PMID: 26626866 PMCID: PMC4832824 DOI: 10.1002/chem.201504018

Abstract

The synthesis and anion-recognition properties of the first halogen-bonding rotaxane host to sense anions in water is described. The rotaxane features a halogen-bonding axle component, which is stoppered with water-solubilizing permethylated β-cyclodextrin motifs, and a luminescent tris(bipyridine)ruthenium(II)-based macrocycle component. (1) H NMR anion-binding titrations in D2 O reveal the halogen-bonding rotaxane to bind iodide with high affinity and with selectively over the smaller halide anions and sulfate. The binding affinity trend was explained through molecular dynamics simulations and free-energy calculations. Photo-physical investigations demonstrate the ability of the interlocked halogen-bonding host to sense iodide in water, through enhancement of the macrocycle component's Ru(II) metal-ligand charge transfer (MLCT) emission.

© 2015 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Keywords: anions; halogen bonding; molecular dynamics; rotaxanes; supramolecular chemistry; water

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