EPR spectra of Cu2+ and VO2+ ions in ammonium hydrogen oxalate hemihydrate [(NH4)HC2O4 . (1/2)H2O] single crystals.
EPR spectra of Cu2+ and VO2+ ions in ammonium hydrogen oxalate hemihydrate [(NH4)HC2O4 . (1/2)H2O] single crystals.
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DOI：
10.1016/j.saa.2005.10.044
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发表时间：
2006-10
期刊：
影响因子：
--
通讯作者：
B. Karabulut;A. Tufan
中科院分区：
文献类型：
--
作者：
B. Karabulut;A. Tufan
Cu2+and VO2+doped ammonium hydrogen oxalate hemihydrate, [(NH4)HC2O4⋅12H2O], single crystals have been studied at room temperature and at 113K in three mutually perpendicular planes. Both ions yield unexpectedly large number of lines. The calculated results of the Cu2+and VO2+doped in [(NH4)HC2O4⋅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.
