Leucine Complexes with Cerium: Stability Constants and Thermodynamic Parameters
Makaleler > Tam Makale · 2011
Yazarlar: Tuba Sismanoglu, Serap TEKSÖZ, Çiğdem İÇHEDEF
Journal of Chemical & Engineering Data, SCI Expanded İndekslerine Giren Dergi, Uluslararası, Wos, 2011, cilt 56, ss 978-983
DOI: 10.1021/je1009416
Özet
The complexation of leucine (Leu) with Ce 3+ was investigated using the potentiometric method at different ionic strengths ( I = (0.10 and 1.00) mol dm −3 ) in KCl medium at elevated temperatures. The stability constants of the leucine complexes with Ce 3+ at metal:ligand (M:L) molar ratios of 1:1, 1:3, and 1:5 were determined. From the data obtained, stability constants were calculated using the program HYPERQUAD2006 for proton−ligand and metal−ligand species. The formation of monomeric species was taken into consideration for Ce 3+ at (25, 37, and 45) °C. Thermodynamic parameters were calculated for all possible leucine complexes. In conclusion, it is indicated that the formation of complexes change the value of the stability constants at various ionic strengths and temperatures.