Author(s): Carmela Bonaccorso, Salvatore Gentile, Fabio Giuseppe Gulino and Domenico Sciotto
Page: [598 - 603] Pages: 6
* (Excluding Mailing and Handling)
The inclusion of ethylammonium, N-methylpyridinium cations and native L-α-amino acids by the watersoluble pentasulfonatocalix[5]arene 1 has been investigated at neutral pH by 1H NMR. The complexation behavior has been compared with that of the homologous tetrasulfonatocalix[4]arene 2. Unlike host 2, host 1 exhibits high selectivity in the recognition of the investigated guests.
Keywords: Calixarenes, water-soluble, molecular recognition, H NMR titration
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