A SeO3 -centered lacunary Keggin-type heteropolyoxovanadate (hetero-POV) K6 H2 [SeV10 O28 (SeO3 )3 ]⋅14 H2 O (1) was isolated by one-pot reaction of KVO3 and SeO2 under acidic conditions. X-ray studies revealed that it comprised a single {VO5 }-capped trivacant B-α-type Keggin ion [SeV9 O33 (VO)]14- with its lacunary sites decorated by three {SeO3 } pyramids. Interestingly, this new basic hetero-POV building block was further used as a precursor to assemble with different transition-metal (TM) ions, yielding a series of TM-sandwiched POVs K6 H8 [(SeV10 O28 (SeO3 )3 )2 (M(H2 O)4 )]⋅24 H2 O (M2+ =Mn2+ (2), Co2+ (3), Zn2+ (4)). All four compounds were characterized by single-crystal X-ray structure analysis, IR, X-ray photoelectron spectroscopy (XPS), EPR, and 51 V NMR spectroscopy. Importantly, three TM-sandwiched derivatives exhibited effective catalytic activity for the heterogeneous oxidative desulfurization of sulfides at room temperature.

中文翻译：

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Lacunary聚氧钒酸盐前体和过渡金属夹心衍生物的硫化物催化氧化。

通过在酸性条件下KVO3和SeO2的一锅反应分离出以SeO3为中心的Keggin型Keggin型杂多氧钒酸盐（杂多POV）K6 H2 [SeV10 O28（SeO3）3]·14 H2 O（1）。X射线研究表明，它由一个{VO5}封端的三价B-α型Keggin离子[SeV9 O33（VO）] 14-组成，其腔位由三个{SeO3}金字塔装饰。有趣的是，这种新的基本异质POV构建基块还被用作与不同过渡金属（TM）离​​子组装的前体，从而产生了一系列TM夹心POV K6 H8 [（SeV10 O28（SeO3）3）2（M （H 2 O）4）]·24 H 2 O（M2 + = Mn2 +（2），Co2 +（3），Zn2 +（4））。所有四种化合物均通过单晶X射线结构分析，IR，X射线光电子能谱（XPS），EPR和51 V NMR光谱进行了表征。重要的，