Potentiometric Studies of Mixed Copper(II) Complexes with 8-Aminolevulinic Acid and Some Selected Peptides

摘要

Ternary complex formation in the system Cu(II)-ALA-L (ALA = δaminolevulinic acid drug; L = peptides) has been studied by pH-potentiometrically at 25 ± 0.1 °C with I = 0.10 mol L~(-1) NaCl. The stability constants of binary and ternary complexes were calculated and interpretated. The concentration distribution of the complexes in solution was graphically presented using the HySS program. In addition, the values of Alog K, log X and relative stabilization percentage (% R.S.) for the mixed-ligand complexes studied have been evaluated and discussed.