Complexes of aluminium(III) with glucose-6-phosphate in aqueous solutions

D. Champmartin, P. Rubini, A. Lakatos, T. Kiss

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

The interaction of aluminium(III) with glucose-6-phosphate (GP: LH2) in aqueous solutions has been studied from pH 1 to pH 8, by pH-potentiometry and multinuclear (31P, 27Al, 13C) NMR spectroscopy. Various mononuclear species (MLH2, MLH, ML, ML2H, ML2 and MLH-3) and dinuclear complexes M2L2H-n (n=1-4) are formed in the system. NMR clearly indicates that GP is already bound to Al(III) at pH 1. The potentiometric speciation results are confirmed and completed by spectroscopic experiments. Many peaks are observed in the 31P NMR spectra suggesting the formation of isomeric species. An attempt to assign the signals to the corresponding complexes is made, allowing a discussion about their structure. Interestingly enough no metal ion-induced deprotonation and coordination of the alcoholic-OH functions have been observed.

Original languageEnglish
Pages (from-to)13-21
Number of pages9
JournalJournal of Inorganic Biochemistry
Volume84
Issue number1-2
DOIs
Publication statusPublished - Apr 18 2001

Keywords

  • Al(III) complexes
  • Glucose-6-phosphate
  • NMR
  • Speciation

ASJC Scopus subject areas

  • Biochemistry
  • Inorganic Chemistry

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