Aramidocalix[4]arenes as new anion receptors |
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Authors: | Francesco Troisi Carmine Gaeta Placido Neri |
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Affiliation: | a Dipartimento di Chimica, Università di Salerno, Via Ponte don Melillo, I-84084 Fisciano (Salerno), Italy b Dipartimento di Scienze Farmaceutiche, Università di Salerno, Via Ponte don Melillo, I-84084 Fisciano (Salerno), Italy |
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Abstract: | Calix[4]arenes bearing aromatic amide (aramid) moieties at the upper rim display interesting recognition properties toward anions and in particular versus planar trigonal nitrate and Y-shaped benzoate. Molecular modeling and DFT calculations indicate that the high affinity displayed by aramidocalix[4]arenes 3 and 4 for nitrate anion is likely due to the planar arrangement of the NH groups, which form an unusual six-hydrogen-bond scheme with nitrate anion. |
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Keywords: | Calixarenes Aromatic amides Anion recognition Hydrogen bonds |
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