Thermodynamic studies on complexation of glutamic acid with dioxovanadium(V) in mixed solvent systems

Authors
Monajjemi, M Moniri, E Panahi, HA
Citation
M. Monajjemi et al., Thermodynamic studies on complexation of glutamic acid with dioxovanadium(V) in mixed solvent systems, J CHEM EN D, 46(5), 2001, pp. 1249-1254
Citations number
21
Categorie Soggetti
Chemistry,"Chemical Engineering
Journal title
JOURNAL OF CHEMICAL AND ENGINEERING DATA
ISSN journal
00219568 → ACNP
Volume
46
Issue
5
Year of publication
2001
Pages
1249 - 1254
Database
ISI
SICI code
0021-9568(200109/10)46:5<1249:TSOCOG>2.0.ZU;2-S
Abstract
The stability constant on complexation Of VO2+ with glutamic acid (Glu) in mixed solvent systems of methanol + water and free-energy changes have been determined spectro-photometrically with a temperature variation method in 0.2 mol dm(-3) sodium perchlorate as ionic medium in the pH range (1.3-5), with high ligand-to-metal ratios. Linear relationships are observed when lo g K is plotted versus 1/D, where K and D represent stability and the dielec tric. constant of the system, respectively. The results are discussed in te rms of the effect of solvent on protonation and complexation.