Complexation of some amine compounds by macrocyclic receptors

Some aspects of complex formation, liquid-liquid extraction, and transport through liquid membrane of various amine compounds like ammonium ion, amine s, amino acids and peptides, with macrocyclic receptors, such as crown ethe rs, cryptands, calixarenes, and cucurbituril are presented. Log K, DeltaH, and T DeltaS data are reported for reaction of some representative complexe s of the amine compounds by macrocyclic receptors obtained from different t echniques such as calorimetric and potentiometric titrations, or spectropho tometric methods in various solvents. Solvent extraction and transport of t hese complexes through bulk liquid membranes are also studied. Based on the se studies, the effect of some factors that might influence the complex for mation, the extraction, and the transport through liquid membranes are disc ussed.