Potentiometric and spectroscopic studies on copper(II) complexes of non-proteinogenic histidine analogues

The amino and carboxylate functions are the main binding sites of all non-proteinogenic histidine analogues. The interaction of aromatic triazolyl and pyridyl nitrogen atoms with copper(II) ions is detected in polynuclear and mononuclear complexes, respectively. 63Cu(II)-Triaz-Ala system at 1:2 metal-to-ligand molar ratio and different pH values (b) 2.24 (c) 3.03; (e) 4.00; (g) 10.27.