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Abstract
Host–guest complexation of the calixarenes as well as thiacalixarenes bearing phosphoryl or sulfonate residues at the upper rim with a series of amino acids, uracils, adenines, and nucleotides (ADP and ATP) in water or water–organic solutions was investigated by high-performance liquid chromatography. Association constants of the 1:1 stoichiometry complexes were calculated from a ratio between the capacity factor of the guests and calixarene concentration in the mobile phase.