EPR of Cu2+ and VO2+ in a cobalt saccharin complex, [Co(sac)(2)(H2O)(4)]center dot 2H(2)O, single crystals

Yerli Y., Koksal F., KARADAĞ A.

SOLID STATE SCIENCES, vol.5, no.9, pp.1319-1323, 2003 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 5 Issue: 9
  • Publication Date: 2003
  • Doi Number: 10.1016/s1293-2558(03)00186-9
  • Journal Name: SOLID STATE SCIENCES
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1319-1323
  • Keywords: EPR, cobalt saccharin, Cu2+, VO2+, doping, ELECTRON-PARAMAGNETIC-RESONANCE, VANADYL ION, SPIN-RESONANCE, ABSORPTION, CITRATE, ESR
  • Ondokuz Mayıs University Affiliated: No

Abstract

Cu2+ and VO2+ doped single crystals of [Co(sac)(2)(H2O)(4)].2H(2)O (Cosacaqua) complex were investigated using EPR technique at ambient temperature. Detailed investigation of the EPR spectra indicated that the Cu2+ and VO2+ substitute the Co2+. Two sites were observed for Cu2+ and VO2+. But each site of V4+ corresponds two different orientations of VO2+. The principal values of the g and the hyperfine tensors were obtained. The spectra indicate that the ground state for Cu2+ is mainly 3d(x2-y2). The covalent bonding parameters for Cu2+ and VO2+ and Fermi contact terms were obtained. (C) 2003 Editions scientifiques et medicales Elsevier SAS. All rights reserved.