| Abstract
| - Two new metal selenites with a combination of vanadium(IV) or vanadium(V) cations, namely, ZnVSe2O7 and Cd6V2Se5O21, have been synthesized by hydrothermal and high-temperature solid-state reactions, respectively. The structure of ZnVSe2O7 features a 3D network of vanadium(IV) selenite with 1D tunnels occupied by zinc(II) ions. The 3D network of vanadium(IV) selenite is formed by corner-sharing VIVO6 octahedral chains bridged by selenite groups. In Cd6V2Se5O21, the interconnection of cadmium(II) ions by bridging and chelating selenite groups led to a 3D framework with large tunnels along the b axis, and the 1D chains of corner-sharing VVO4 tetrahedra are inserted in the above large tunnels and are bonded to the cadmium selenite framework via Cd−O−V bridges. Both compounds exhibit broad emission bands in the blue-light region. Results of magnetic property measurements show there is significant antiferromagnetic interaction between V4+ centers in ZnVSe2O7. The electronic structure calculations for both compounds have been also performed.
- Two new quaternary d10 transition-metal−V−Se−O phases, namely, ZnVSe2O7 and Cd6V2Se5O21, have been reported. The structure of ZnVSe2O7 can be viewed as the zinc(II) cations being located at the 1D tunnels of the 3D vanadium(IV) selenite, whereas Cd6V2Se5O21 features a 3D framework of cadmium(II) selenite with large tunnels filled by 1D chains of corner-sharing VVO4 tetrahedra.
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