EPR, FTIR, Powder XRD and Optical Absorption Studies of Cu(II) Ion in Triaqua(1,10-Phenanthroline-k2N,N′)(Sulfato-kO)Zinc(II)

摘要

Electron paramagnetic resonance (EPR), optical, Fourier-transform infrared (FTIR) and powder X-ray diffraction (XRD) studies have been carried out on Cu(II)-doped triaqua(1,10-phenanthroline-k2 N,N′)(sulfato-kO)zinc(II) to get information about the position and spin Hamiltonian parameters of the dopant. Angular variation of copper hyperfine structure lines in EPR study shows the presence of a single site with g and A values as: g _xx = 2.003, g _yy = 2.001, g _zz = 2.223; A _xx = 4.41 mT, A _yy = 2.39 mT and A _zz = 12.16 mT. The slightly lower parallel value obtained for the copper nucleus has been explained by considering admixture of the ground state with the excited state. The direction cosines of principle g and A values suggest that the impurity is present interstitially. Admixture coefficients and additional parameters (P, k, α 2, α′) have also been evaluated. Optical, FTIR and powder XRD techniques have been used to reconfirm the structure of the host lattice.