A novel sandwiched-type vanadoselenite with the formula of K₆H₈[(SeV₁₀O₂₈(SeO₃)₃)₂(Ni(H₂O)₄)]·24H₂O (1) has been synthesized in aqueous medium and well characterized. Single crystal X-ray diffraction indicates that the sandwiched polyanion [(SeV₁₀O₂₈(SeO₃)₃)₂(Ni(H₂O)₄)]¹⁴⁻ consisted of two trivicant Keggin building units [SeV₁₀O₂₈(SeO₃)₃]⁸⁻ and one interconnected Ni²⁺ ion. Experimental results demonstrated that it could serve as a heterogeneous catalyst for sulfoxidation of thioethers and performed effectively catalytic activity. Under the optimized reaction condition, methyl phenyl sulfoxide could be oxidized to methyl phenyl sulfones within 1 h by using 1 mmol of the substrate, 3 mmol of TBHP and 2 μmol of the catalyst 1 at 25 °C in methanol. Moreover, catalyst 1 can also be easily recycled and reused four times without obvious decrease of catalytic activity.

在水介质中合成了一种新型的K ₆ H ₈ [（SeV ₁₀ O ₂₈（SeO ₃）₃）₂（Ni（H ₂ O）₄）]·24H ₂ O（1）夹心型钒硒矿。并具有很好的特征。单晶X射线衍射表明，夹心的聚阴离子[（SeV ₁₀ O ₂₈（SeO ₃）₃）₂（Ni（H ₂ O）₄）] ^14-由两个tri的Keggin构建单元[SeV ₁₀O ₂₈（SeO ₃）₃ ] ^8-和一个相互连接的Ni ²⁺离子。实验结果表明，它可以作为硫醚硫氧化的非均相催化剂，并具有有效的催化活性。在优化的反应条件下，通过在25°C的甲醇中使用1 mmol的底物，3 mmol的TBHP和2μmol的催化剂1，可以在1 h内将甲基苯基亚砜氧化为甲基苯基砜。此外，催化剂1也可以容易地再循环和再使用四次而不会明显降低催化活性。