Ternary nickel (II) complexes with 8-hydroxyquinoline and some amino acids

ABSTRACT

In this work, we report the results of a speciation study on the ternary complexes present in the systems formed by Ni(II) ion, 8-hydroxyquinoline (8-HQ) and the amino acids = α-alanine (HαAla), β-alanine (HβAla), phenylalanine (HPhe), proline (HPro), glycine (HGly), serine (HSer), threonine (HThr), aspartic acid (H₂Asp), glutamic acid (H₂Glu), methionine (HMet), histidine (H₂His) and cysteine (H₂Cys). The analysis involved the use of the potentiometric data with a least-squares program (LETAGROP) in aqueous 1 M NaCl solution at 25°C. The binary complexes formed in the system Ni(II) – 8-HQ in aqueous 1 M NaCl solution at 25°C were also determined and are presented here.

KEYWORDS:

• Nickel (II) complexes
• 8-hydroxyquinoline
• potentiometric studies
• speciation
• ternary complexes

Disclosure statement

No potential conflict of interest was reported by the authors.

Supplementary material

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