柠檬酸氢二铵[（NH4）2C6H6O7]单晶中VO2+离子的电子顺磁共振和光吸收研究
An EPR and optical absorption study of VO2+ ions in di-ammonium hydrogen citrate [(NH4)2C6H6O7] single crystals.
作者信息
Karabulut Bünyamin, Tufan Ayşe
机构信息
Ondokuz Mayis University, Faculty of Art and Sciences, Department of Physics, 55139 Samsun, Turkey.
出版信息
Spectrochim Acta A Mol Biomol Spectrosc. 2008 Feb;69(2):642-6. doi: 10.1016/j.saa.2007.05.015. Epub 2007 May 13.
Single crystal and powder EPR studies of VO2+ doped di-ammonium hydrogen citrate [(NH4)2C6H6O7] are carried out at room temperature. The angular variation of the EPR spectra show three different VO2+ complexes that are located in different chemical environment, and each environment contains two magnetically inequivalent VO2+ sites in distinct orientations occupying substitutional positions in the lattice. Crystalline field around the VO2+ ion is nearly axial. The optical absorption spectrum shows two bands centred at 16,949 and 12,345cm(-1). Spin Hamiltonian parameters and molecular orbital coefficients are calculated from the EPR and optical data, and results are discussed.
在室温下对掺杂VO₂⁺的柠檬酸氢二铵[(NH₄)₂C₆H₆O₇]进行了单晶和粉末电子顺磁共振（EPR）研究。EPR光谱的角度变化显示出三种不同的VO₂⁺配合物，它们位于不同的化学环境中，并且每个环境在晶格中占据替代位置的不同取向上包含两个磁不等价的VO₂⁺位点。VO₂⁺离子周围的晶体场近乎轴向。光吸收光谱显示出以16,949和12,345cm⁻¹为中心的两个谱带。根据EPR和光学数据计算了自旋哈密顿参数和分子轨道系数，并对结果进行了讨论。
Zotero 插件