Speciation study of nickel(II)-1,10-phenanthroline-amino acid ternary complexes in 1.0 M NaCl at 25 °C

AbstractAbstractTernary Ni(II) complexes formed with 1,10-phenanthroline (Phen) and the amino acids glycine (Gly, HL), α-alanine (Ala, HL), β-alanine (βAla, HL), proline (Pro, HL), phenylalanine (Phe, HL), methionine (Met, HL), serine (Ser, HL) and threonine (Thr, HL) were studied in aqueous solution using 1.0 M NaCl at 25 °C as an ionic medium. The systems were studied by potentiometric measurements. Analysis of the potentiometric data was done with the least-squares-based program LETAGROP, supporting the formation of species Ni(Phen)(HL)2+, Ni(Phen)(L)+, Ni(Phen)(L)(OH), Ni(Phen)2(L)+ and Ni(Phen)(L)2. Species distribution diagrams were generated and the relative stabilities were analyzed using Δ log10 K, log10 X and % RS values.Keywords: Nickel(II)1,10-PhenanthrolineAmino acidsPotentiometric studiesTernary complexesStability constants AcknowledgementsWe thank the Dean of Research and Development of the Simon Bolivar University for financial support to complete this work.Disclosure statementNo potential conflict of interest was reported by the author(s).