Synthesis, spectroscopic and thermal studies of the copper(II) aspartame chloride complex

Çakır Ş., Coşkun E., Naumov P., Biçer E., Bulut I., İçbudak H., ...More

Journal of Molecular Structure, vol.608, no.1, pp.101-107, 2002 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 608 Issue: 1
  • Publication Date: 2002
  • Doi Number: 10.1016/s0022-2860(01)00939-5
  • Journal Name: Journal of Molecular Structure
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.101-107
  • Keywords: Aspartame, Copper, ESR, FT IR, Thermal analysis, UV/vis
  • Ondokuz Mayıs University Affiliated: Yes

Abstract

Aspartame adduct of copper(II) chloride Cu(AsP)2Cl2·2H2O (Asp = aspartame) is synthesized and characterized by elemental analysis, FT IR, UV/vis, ESR spectroscopies, TG, DTG, DTA measurements and molecular mechanics calculations. Aqueous solution of the green solid absorbs strongly at 774 and 367 nm. According to the FT IR spectra, the aspartame moiety coordinates to the copper(II) ion via its carboxylate ends, whereas the ammonium terminal groups give rise to hydrogen bonding network with the water, the chloride ions or neighboring carboxylate groups. The results suggest tetragonally distorted octahedral environment of the copper ions. © 2002 Elsevier Science B.V. All rights reserved.