Easily-Prepared Hydroxy-Containing Receptors Recognise Anions in Aqueous Media

21 December 2018, Version 1
This content is a preprint and has not undergone peer review at the time of posting.


Despite their readily availability, O–H groups have received relatively little attention as anion recognition motifs. Here, we report two simple hydroxy-containing anion receptors that are prepared in two facile steps followed by anion exchange, without the need for chromatographic purification at any stage. These receptors contain a pyridinium bis(amide) motif as well as hydroxyphenyl groups, and bind mono- and divalent anions in 9:1 CD3CN:D2O, showing a selectivity preference for sulfate. Notably, a “model” receptor that does not contain hydroxy groups shows only very weak sulfate binding in this competitive solvent mixture.


supramolecular complexes
Host-guest systems
Hydrogen bonds

Supplementary materials

Morshedi et al OH anion receptors Supp Info


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