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Issue 27, 2014
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Halide selective anion recognition by an amide-triazolium axle containing [2]rotaxane

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Abstract

A new rotaxane containing the 3-amido-phenyl-triazolium group incorporated into the interlocked structure's axle component has been prepared by a chloride anion templated clipping strategy. Proton NMR titration experiments reveal that the interlocked host displays a high degree of halide anion recognition in competitive 1 : 1 CDCl3–CD3OD solvent mixture. Chloride and bromide anions are bound strongly and selectively, with negligible complexation of the larger, more basic oxoanions, acetate and dihydrogen phosphate being observed. Density functional theory calculations on the related axle motifs 3-amido-phenyl-triazolium, pyridinium bis-triazole and pyridinium bis-amide were performed, and indicate that the new rotaxane axle motif displays much weaker oxoanion binding than the pyridinium based systems.

Graphical abstract: Halide selective anion recognition by an amide-triazolium axle containing [2]rotaxane

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Publication details

The article was received on 17 Apr 2014, accepted on 15 May 2014 and first published on 30 May 2014


Article type: Paper
DOI: 10.1039/C4OB00801D
Author version available: Download Author version (PDF)
Citation: Org. Biomol. Chem., 2014,12, 4924-4931
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    Halide selective anion recognition by an amide-triazolium axle containing [2]rotaxane

    N. G. White, A. R. Colaço, I. Marques, V. Félix and P. D. Beer, Org. Biomol. Chem., 2014, 12, 4924
    DOI: 10.1039/C4OB00801D

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