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- W2328419081 endingPage "10567" @default.
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- W2328419081 abstract "Studies of a series of urea-based anion receptors designed to probe the potential for anion recognition through combinations of hydrogen and halogen bonding are presented. Proton- and fluorine-NMR spectroscopy indicates that the two interactions act in concert to achieve binding of certain anions, a conclusion supported by computational studies. Replacement of the halogen-bond donating iodine substituent by fluorine (which does not participate in halogen bonding) enables estimation of the contribution of this interaction to the free energy of anion binding. Evidence for attractive contacts between anions and electron-deficient arenes arising from the use of perfluoroarene-functionalized ureas as control receptors is also discussed. The magnitude of the free energy contribution of halogen bonding depends both on the geometric features of the group linking the hydrogen- and halogen-bond donor groups and on the identity of the bound anion. The results are interpreted in relation to fundamental features of the halogen-bonding interaction, including its directionality and unusual preference for halides over oxoanions. Cooperation between two distinct noncovalent interactions leads to unusual effects on receptor selectivity, a result of fundamental differences in the interactions of halogen- and hydrogen-bond donor groups with anions." @default.
- W2328419081 created "2016-06-24" @default.
- W2328419081 creator A5052298110 @default.
- W2328419081 creator A5067598631 @default.
- W2328419081 creator A5078189430 @default.
- W2328419081 date "2011-06-13" @default.
- W2328419081 modified "2023-10-03" @default.
- W2328419081 title "Anion Receptors Composed of Hydrogen- and Halogen-Bond Donor Groups: Modulating Selectivity With Combinations of Distinct Noncovalent Interactions" @default.
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- W2328419081 doi "https://doi.org/10.1021/ja202096f" @default.
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