Electron paramagnetic resonance studies of Cu2+ ion in Tetraaqua-di(nicotinamide)Ni(II)-saccarinates single crystals


Yerli Y. , KAZAN S., YALCIN O., AKTAS B.

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, cilt.64, ss.642-645, 2006 (SCI İndekslerine Giren Dergi) identifier

  • Cilt numarası: 64 Konu: 3
  • Basım Tarihi: 2006
  • Doi Numarası: 10.1016/j.jaa.2005.07.068
  • Dergi Adı: SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
  • Sayfa Sayıları: ss.642-645

Özet

X-band (approximate to 9.8 GHz) electron paramagnetic resonance (EPR) measurement at ambient temperature in three mutually perpendicular planes have been carried out on a single crystal of Cu2+ doped mixed ligand complex of Ni(II) with saccharin and nicotinamide [Ni(Nic)2(H2O)4](sac)2. The angular dependent spectra showed that the Cu2+ ion enters Ni2+ sites in the lattice and distorted local environment of Ni2+ site. The principal g and A values, covalency parameter (alpha '(2)), mixing coefficients (alpha and beta) and Fermi contact term (K) have been evaluated from the EPR analysis. The ground-state wave function of the Cu2+ ion has been constructed using the alpha '(2), alpha and beta values. The nature of the distortion present in the lattice is obtained from the values of the mixing coefficients. (c) 2005 Elsevier B.V. All rights reserved.