| Abstract
| - A modified calix[4]pyrrole, namely meso-tetramethyl-tetrakis-(4-hydroxyphenyl) calix[4]pyrrole, 1, has beensynthesized and characterized. 1H NMR investigations in various deuterated solvents seems to indicate thatthis receptor interacts with acetone-d6. The solution thermodynamics of 1 in various solvents is reported.Complexation studies in CD3CN show that the NH and OH functionalities of 1 are the active sites of itsinteraction with the fluoride and the dihydrogen phosphate anions. The composition of the anion complexeswas established through conductance measurements. In all cases, 1:1 complexes are formed. The thermodynamics of anion complexation in acetonitrile and N,N-dimethylformamide is discussed comparatively with previousreported data for the parent calix[4]pyrrole, 2, and these anions in these solvents. The medium effect onanion complexation is discussed in terms of the solvation properties of the reactants and the product inacetonitrile and N,N-dimethylformamide. An oligomeric material containing 1 as anchor group was synthesizedand characterized by mass spectrometry. Preliminary studies have been performed to assess the extractingproperties of this oligomer for the removal of phosphates from aqueous solutions. The effects of pH, temperatureon the extraction of this anion salt from water, as well as the kinetics of the process (fast) were investigated.
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