Aramidocalix[4]arenes as new anion receptors
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- 作者：Francesco Troisi ; Alessio Russo ; Carmine Gaeta ; Giuseppe Bifulco ; Placido Neri
- 关键词：Calixarenes ; Aromatic amides ; Anion recognition ; Hydrogen bonds
- 刊名：Tetrahedron Letters
- 出版年：2007
- 出版时间：5 November 2007
- 年：2007
- 卷：48
- 期：45
- 页码：7986-7989
- 全文大小：260 K
文摘
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.