Determination of stability constants of ternary copper(II) complexes formed with picolinic acid and several amino acids
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...This signal is attributed to Cu since dipicolinic acid [10], glutamic acid [20,35] and the other amino acids [20] have no signals in the evaluated potential range....
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...These differences in electrochemical behaviour are produced by the coordination of the ligands to the metallic centre of Cu (II), which significantly modify the electroactivity of the metal [10,20,38]....
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...Comparison of the formation constants of the complexes [Cu(Pic)(L)(H2O)2] [20] and [Cu(Dipi)(L)(H2O)] − formed in the Cu (II) -Pic-amino acid and Cu (II) -Dipi-amino acid systems....
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...The ionisation constants of the ligands, the stability constants of the hydroxo complexes of Cu (II), and the stability constants of the binary complexes formed in the systems Cu(II)H2Dipi and Cu(II)-amino acid were determined by our research group [20,21] at the same experimental conditions used in this work (25 oC and 1....
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...Based on bibliography [20,24] it is expected that the spectra changes are product of the deprotonation, and subsequent coordination of the imidazole ring....
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References
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"Determination of stability constant..." refers background in this paper
...This is due to the coordination of the ligands to the metallic centre of Cu (II), which significantly modifies the electroactivity of the metal [34,35]....
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1,400 citations
"Determination of stability constant..." refers methods in this paper
...The species distribution diagrams were generated using the HYSS computational program [19] with the values of βpqrs, which are summarised in Tables 2–3....
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