Potentiometric and spectroscopic studies of transition metal complexes of bis(imidazolyl) and bis(pyridyl) derivatives of amino acids

K. Várnagy, I. Sóvágó, Wolfgang Goll, H. Süli-Vargha, Giovanni Micera, Daniele Sanna

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Copper(II) and zinc(II) complexes of H-Gly-BIMA (glycinamido-bis(imidazol-2-yl)methane) and copper(II), nickel(II), cobalt(II) and zinc(II) complexes of Prodipa (prolineamido-bis(pyridin-2-yl) methane) were studied by potentiometry, electron paramagnetic resonance and visible spectroscopy. The data revealed that both ligands are ambidentate. Imidazole and pyridine nitrogens of H-Gly-BIMA and Prodipa, respectively, are the exclusive binding sites in acidic media, but the metal binding ability of the bis(imidazolyl) residue is much higher than that of the bis(pyridyl) ligand. The coordination of the amino, amide and imidazole/pyridine nitrogens was concluded around physiological pH, which resulted in the formation of an imidazole bridged dimeric species in the case of H-Gly-BIMA.

Original languageEnglish
Pages (from-to)233-242
Number of pages10
JournalInorganica Chimica Acta
Volume283
Issue number1
Publication statusPublished - Dec 1 1998

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Coordination Complexes
Metal complexes
imidazoles
Pyridine
Transition metals
amino acids
Amino acids
Methane
Zinc
transition metals
Ligands
Nitrogen
Derivatives
Copper
Amino Acids
Binding sites
Amides
Potentiometry
Paramagnetic resonance
Cobalt

Keywords

  • Amino acid derivative complexes
  • Electrochemistry
  • Transition metal complexes

ASJC Scopus subject areas

  • Biochemistry
  • Inorganic Chemistry
  • Physical and Theoretical Chemistry
  • Materials Chemistry

Cite this

Potentiometric and spectroscopic studies of transition metal complexes of bis(imidazolyl) and bis(pyridyl) derivatives of amino acids. / Várnagy, K.; Sóvágó, I.; Goll, Wolfgang; Süli-Vargha, H.; Micera, Giovanni; Sanna, Daniele.

In: Inorganica Chimica Acta, Vol. 283, No. 1, 01.12.1998, p. 233-242.

Research output: Contribution to journalArticle

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AU - Sóvágó, I.

AU - Goll, Wolfgang

AU - Süli-Vargha, H.

AU - Micera, Giovanni

AU - Sanna, Daniele

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