Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1238522 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 2006 | 7 Pages |
Abstract
Cu2+ and VO2+ doped ammonium hydrogen oxalate hemihydrate, [(NH4)HC2O4â
12H2O], single crystals have been studied at room temperature and at 113Â K in three mutually perpendicular planes. Both ions yield unexpectedly large number of lines. The calculated results of the Cu2+ and VO2+ doped in [(NH4)HC2O4â
12H2O] indicate that both ions substitute with the NH4+ ion in the structure. The EPR spectra of Cu2+ ions are characteristic of tetragonally elongated octahedral site and the spectra of VO2+ are characteristic of tetragonally compressed complex. The angular variation of the EPR spectra has shown that two different Cu2+ and VO2+ complexes are located in different chemical environments, and each environment contains two magnetically inequivalent Cu2+ and VO2+ sites in distinct orientations occupying substitutional positions in the lattice and show very high angular dependence. The principal g and the hyperfine (A) values of both ions are determined.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Bünyamin Karabulut, AyÅe Tufan,