Deepa S, Velavan K, Sougandi I, Venkatesan R, Sambasiva Rao P
Department of Chemistry, Pondicherry University, Pondicherry 605 014, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2005 Sep;61(11-12):2482-7. doi: 10.1016/j.saa.2004.09.013.
Single crystal EPR study of VO(II)-doped magnesium potassium phosphate hexahydrate has been carried out at room temperature. Single crystal rotations in the three orthogonal planes indicate that the paramagnetic impurity has entered the lattice in place of magnesium ions by replacing the equatorial and axial coordinated water molecules. The spin Hamiltonian parameters obtained for the two substitutional sites are: site 1: g1=1.9800, g2=1.9774, g3=1.9296, A1=7.25 mT, A2=8.09 mT, A3=18.69 mT and site 2: g1=1.9802, g2=1.9765, g3=1.9296, A1=6.82 mT, A2=8.48 mT, A3=18.75 mT, respectively. Superhyperfine, from protons of ligand water molecules, has been observed at certain orientations. It has been concluded that VO bond directions of the two substitutional ions are orthogonal to each other.
在室温下对掺VO(II)的六水合磷酸镁钾进行了单晶电子顺磁共振研究。在三个正交平面内的单晶旋转表明，顺磁性杂质通过取代赤道和轴向配位的水分子，取代镁离子进入了晶格。两个取代位点获得的自旋哈密顿参数分别为：位点1：g1 = 1.9800，g2 = 1.9774，g3 = 1.9296，A1 = 7.25 mT，A2 = 8.09 mT，A3 = 18.69 mT；位点2：g1 = 1.9802，g2 = 1.9765，g3 = 1.9296，A1 = 6.82 mT，A2 = 8.48 mT，A3 = 18.75 mT。在某些取向下观察到了来自配体水分子质子的超超精细相互作用。得出的结论是，两个取代离子的VO键方向相互正交。
