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Kolekcje
Inne
Ni(II) complexes of dipeptides: a thermodynamic and spectroscopic study.
Autorzy
Rok wydania
2001
Czasopismo
Numer woluminu
20
Strony
615-621
DOI
10.1016/S0277-5387(01)00713-6
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
Complex formation equilibria of some dipeptides (glycyl-alanine, glycyl-lysine, β-alanyl-alanine, β-alanyl-lysine, histidyl-alanine and histidyl-lysine) with the Ni(II) ion have been studied in aqueous solution at I=0.1 mol dm−3 (KNO3) and T=25°C. Protonation and complex formation constants have been potentiometrically determined. The structure of the main complex species is discussed on the basis of thermodynamic data obtained by direct calorimetry, CD and absorption spectra. The participation of the amide nitrogen in complex formation is suggested, while no evidence supports the participation of the ε-NH2 side group of lysine in coordination.
Słowa kluczowe
Nickel-dipeptide complexes, Glycyl-alanine, Glycyl-lysine, Histidyl-alanine, Histidyl-lysine, β-Alanyl-alanine, β-Alanyl-lysine
Adres publiczny
https://doi.org/10.1016/S0277-5387(01)00713-6
Strona internetowa wydawcy
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