The synthesis and anion binding properties of several new cone calixarenes having different flexibility and tetrafunctionalized at the upper rim with various type of hydrogen bonding donor groups such as thioureas (1-3), trifluoroacetamides (4, 5) and perfluorinated alcohols (6) are reported. The results obtained show that thiourea receptors are the most effective in the complexation of all anions and that the rigid cone compound 2 is more efficient than the mobile cone analog 1 in the binding of spherical anions, whereas the reverse is true for the complexation of tetrahedral H2PO4- anion.
New Tetrafunctionalized Cone Calixarenes as Neutral Hosts for Anion Recognition / CASNATI A.; PIRONDINI L.; PELIZZI N.; UNGARO R.. - In: SUPRAMOLECULAR CHEMISTRY. - ISSN 1061-0278. - 12(2000), pp. 53-65. [10.1080/10610270008029804]