Iodide Recognition and Sensing in Water by a Halogen-Bonding Ruthenium(II)-Based Rotaxane
authors Langton, MJ; Marques, I; Robinson, SW; Felix, V; Beer, PD
nationality International
journal CHEMISTRY-A EUROPEAN JOURNAL
author keywords anions; halogen bonding; molecular dynamics; rotaxanes; supramolecular chemistry; water
keywords ANION RECOGNITION; AQUEOUS-MEDIA; SUPRAMOLECULAR CHEMISTRY; TRANSITION-METAL; HIGH-AFFINITY; HOST SYSTEM; RECEPTOR; FLUORESCENT; BINDING; CHLORIDE
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 beta-cyclodextrin motifs, and a luminescent tris(bipyridine) ruthenium (II)-based macrocycle component. H-1 NMR anion-binding titrations in D2O 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.
publisher WILEY-V C H VERLAG GMBH
issn 0947-6539
year published 2016
volume 22
issue 1
beginning page 185
ending page 192
digital object identifier (doi) 10.1002/chem.201504018
web of science category Chemistry, Multidisciplinary
subject category Chemistry
unique article identifier WOS:000368897600023
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journal impact factor 5.160
5 year journal impact factor 4.950
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