Strong and selective anion binding within the central cavity of molecular knots and links

Ayme, Jean-Francois and Beves, Jonathan E. and Campbell, Christopher J. and Gil-Ramirez, Guzman and Leigh, David A. and Stephens, Alexander J. (2015) Strong and selective anion binding within the central cavity of molecular knots and links. Journal of the American Chemical Society, 137 (31). pp. 9812-9815. ISSN 0002-7863

Full content URL: http://pubs.acs.org/doi/full/10.1021/jacs.5b06340

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Abstract

A molecular pentafoil knot and doubly and triply entwined [2]catenanes based on circular Fe(II) double helicate scaffolds bind halide anions in their central cavities through electrostatic and CH···X– hydrogen-bonding interactions. The binding is up to (3.6 ± 0.2) × 1010 M–1 in acetonitrile (for pentafoil knot [2·Cl](PF6)9), making these topologically complex host molecules some of the strongest synthetic noncovalent binders of halide anions measured to date, comparable in chloride ion affinity to silver salts.

Keywords:Hydrogen bonds, Negative ions, Salts, Scaffolds, Anion binding, Chloride ions, Halide anions, Host molecules, Hydrogen bonding interactions, Molecular knots, Silver salts, 2catenanes, Ions, acetonitrile, catenane, chloride ion, ferrous ion, halide, silver, Article, binding affinity, crystal structure, hydrogen bond, synthesis, JCOpen
Subjects:F Physical Sciences > F100 Chemistry
Divisions:College of Science > School of Chemistry
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ID Code:22719
Deposited On:29 Apr 2016 09:55

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