A Cu(II)ion D-ribóz és D-glükózamin komplexeinek lokális szerkezete Spektrofotometriás, ESR és EXAFS vizsgálatok

Translated title of the contribution: Structure of Cu(II) complexes of D-ribose and D-glucosamine. Electronic, ESR and EXAFS studies

László Nagy, Toshio Yamaguchi, Masaharu Nomura, Tibor Páli, Hitoshi Ohtaki

Research output: Contribution to journalArticle

Abstract

Interactions between D-ribose or D-glucosamine and Cu(II) ion have been studied by electronic spectra, ESR, and Cu K-XANES and -EXAFS measurements. All data have shown that (1:1) Cu(II)-sugar complexes are formed in aqueous solution at high pH. The have ESR spectra of the two Cu(II)-sugar complexes indicated the presence of a dimeric species via hydroxide oxygen atoms in the solution. From the analysis of the EXAFS spectra the oxygen coordination geometry around Cu(II) ion and the Cu(II)-O bond lengths within the Cu(II)-sugar complexes are not very different from those of the hexaaqua Cu(II) ion. EXAFS Fourier transforms have clearly shown a peak ascribed to non-bonded Cu(II)...C interactions, indicating the formation of chelate rings of the sugar-ligand around the Cu(II) ion. The most likely structure of the Cu(II)-sugar complexes is proposed.

Translated title of the contributionStructure of Cu(II) complexes of D-ribose and D-glucosamine. Electronic, ESR and EXAFS studies
Original languageHungarian
Pages (from-to)145-147
Number of pages3
JournalMagyar Kemiai Folyoirat, Kemiai Kozlemenyek
Volume106
Issue number4
Publication statusPublished - Dec 1 2000

ASJC Scopus subject areas

  • Chemistry(all)

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