An EPR study of VO2+ ions in arsanilic acid [C6H4AsNO (H2O)(2)] single crystals

Abstract

EPR spectra of VO2+ ions doped [C6H4AsNO (H2O)(2)] and powder have been studied at room temperatures. The detailed EPR analysis have shown that two different VO2+ Complexes are located in different chemical environments, and each environment contains two magnetically inequvalent VO2+ sites in distinct orientations occupying interstitial positions in the lattice and show very high angular dependence. The EPR spectra of VO2+ are characteristic of tetragonally compressed complex. The spin Hamiltonian parameters obtained from single crystal data for two VO2+ Complexes. These are found to be axially symmetric. The EPR spin-Hamiltonien parameters have been used to evaluate the bonding coefficients of the vanadyl ion in the arsanilic acid lattice. (C) 2006 Elsevier B.V. All rights reserved.