Structural evaluation and position of the VO~(2+) ion in diaquacadmium(diaquabismalonato)cadmate: spectroscopic studies

摘要

Single crystal EPR, optical, FT-IR, and powder XRD studies of VO~(2+) ion-doped diaquacadmium(di-aquabismalonato)cadmate were carried out at ambient temperature to ascertain the structural properties. In EPR, the angular variation of VO~(2+) ion hyperfine lines indicated a single site, with spin Hamiltonian parameters g and A values g_(xx)= 1.979, g_(yy) = 1.963, g_(zz) = 1.939, A_(xx)= 0.0074 cm~(-1), A_(yy) = 0.0065 cm~(-1), and A_(zz)= 0.0166 cm~(-1). The calculated results of the VO~(2+) ion-doped dia-quacadmium(diaquabismalonato)cadmate indicate VO~(2+) substitutes the Cd~(2+) ion in the host lattice, and it has rhombic symmetry. The EPR and optical absorption data were corroborated to obtain various bonding parameters, from which the nature of bonding in the complex was discussed. FT-IR and powder XRD studies were used to observe the effect of dopant on structural parameters of the host lattice.