The involvement of the o-NH2 terminal group of L-lysine and L-ornithine in the complexation of Cu(II) was investigated by means of potentiometry, calorimetry, UV-Vis and ESR. The thermodynamic parameters obtained by combining the potentiometric and calorimetric data show that the two ligands complex copper(II) in a different manner, indicating that the NH2 terminal group is involved in ornithine complexes only. UV-Vis and ESR spectra further support the involvement of ornithine NH2 and provide details on the complexation geometries of the complexes of the two amino acids.
Copper (II) complexes with L-lysine and L-ornithine: is the side-chain involved in the coordination? A thermodynamic and spectroscopic study
CONATO, Chiara;REMELLI, Maurizio;
2000
Abstract
The involvement of the o-NH2 terminal group of L-lysine and L-ornithine in the complexation of Cu(II) was investigated by means of potentiometry, calorimetry, UV-Vis and ESR. The thermodynamic parameters obtained by combining the potentiometric and calorimetric data show that the two ligands complex copper(II) in a different manner, indicating that the NH2 terminal group is involved in ornithine complexes only. UV-Vis and ESR spectra further support the involvement of ornithine NH2 and provide details on the complexation geometries of the complexes of the two amino acids.File in questo prodotto:
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