Spectroscopic Study of the Interaction of Amino Acids with Copper(II) Ions in Aqueous Solution

Abstract

The interactions of copper(II) ions with some essential amino acids viz., L-leucine(Leu), L-glycylglycine (Gly.gly), L-methionine (meth), L-lysine (Lys) have been studied in aqueous solution at different temperatures by visible spectrophotometric method. The equilibrium constants of the process. [Cu(H₂O)₄]²⁺ + L = [Cu(H₂O)₃L]²⁺ + H₂O (where L stands for the monodentate amino acid) have been determined and the thermodynamic parameters i.e., ΔGº, ΔHº and ΔSº have been calculated.