PHZS:Cu2+的EPR谱和局域结构研究

Theoretical Investigation of the EPR Spectra and Local Structures for PHZS: Cu2+

  • 摘要:采用Cu 2+离子正交对称电子顺磁共振(EPR)参量的高阶微扰公式计算K 2Zn(SO 42·6H 2O:Cu 2+的EPR参量 g因子( g xg yg z)和超精细结构常数( A xA yA z)。研究结果表明,K 2Zn(SO 42·6H 2O中Cu(H 2O) 6 2+基团的Cu 2+-H 2O键长分别为 R x≈ 0.197 nm, R y≈ 0.213 nm, R z≈ 0.224 nm;中心金属离子基态波函数混合系数分别为 α≈ 0.978和 β≈ 0.209。所得EPR参量理论值与实验符合很好。

    Abstract:The electron paramagnetic resonance (EPR) parameters for K 2Zn(SO 4) 2·6H 2O:Cu 2+, i.e. gfactors ( g x, g y, g z) and hyperfine structure constants ( A x, A y, A z), are theoretically investigated by using the high-order perturbation formulas of these parameters for Cu 2+in orthorhombically elongated octahedra. Based on the calculation, the Cu 2+-H 2O bond-lengths of theCu(H 2O) 6 2+cluster in K 2Zn(SO 4) 2·6H 2O crystal are found to be R x≈ 0.197 nm, R y≈ 0.213 nm, R z≈ 0.224 nm, and the mixing coefficients of the ground state wave function parameters are α≈ 0.978 and β≈ 0.209, respectively. The calculated EPR parameters show a good agreement with the experimental data.

/

    返回文章
    返回
      Baidu
      map