Complexes of Al(III) with d-gluconic acid

A. Lakatos, T. Kiss, Roberta Bertani, Alfonso Venzo, Valerio B. Di Marco

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

The complexation of Al(III) with d-gluconic acid was studied in solution by means of pH-potentiometry, ESI mass spectrometry and one- and two-dimensional NMR spectroscopy. Six complexes were found to form in solution from pH 2 to 10: [AlL]2+, [AlLH-1]+, [AlLH-2], [AlLH-3]-, [AlL2H-1] and [AlL2H-2]-. NMR spectroscopy indicated very complicated chemical exchange processes between the free ligand and gluconic acid molecules bound in the metal complexes, with different coordination modes resulting in changes both of the chemical shift and of the line shape of the signals. A solid complex [AlL2H-1] · 2H2O was isolated as a microcrystalline powder and characterized. The structures of the complexes are discussed on the basis of the spectroscopic results and MM force field calculations.

Original languageEnglish
Pages (from-to)118-124
Number of pages7
JournalPolyhedron
Volume27
Issue number1
DOIs
Publication statusPublished - Jan 20 2008

Fingerprint

Nuclear magnetic resonance spectroscopy
Magnetic Resonance Spectroscopy
Chemical Phenomena
Potentiometry
potentiometric analysis
nuclear magnetic resonance
acids
Acids
Electrospray Ionization Mass Spectrometry
Coordination Complexes
Chemical shift
Metal complexes
Complexation
Powders
spectroscopy
field theory (physics)
Mass spectrometry
chemical equilibrium
line shape
mass spectroscopy

Keywords

  • Aluminium(III)
  • d-gluconic acid
  • ESI-MS
  • NMR
  • Speciation

ASJC Scopus subject areas

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

Cite this

Complexes of Al(III) with d-gluconic acid. / Lakatos, A.; Kiss, T.; Bertani, Roberta; Venzo, Alfonso; Di Marco, Valerio B.

In: Polyhedron, Vol. 27, No. 1, 20.01.2008, p. 118-124.

Research output: Contribution to journalArticle

Lakatos, A, Kiss, T, Bertani, R, Venzo, A & Di Marco, VB 2008, 'Complexes of Al(III) with d-gluconic acid', Polyhedron, vol. 27, no. 1, pp. 118-124. https://doi.org/10.1016/j.poly.2007.08.035
Lakatos, A. ; Kiss, T. ; Bertani, Roberta ; Venzo, Alfonso ; Di Marco, Valerio B. / Complexes of Al(III) with d-gluconic acid. In: Polyhedron. 2008 ; Vol. 27, No. 1. pp. 118-124.
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