{SeO(OH)} Bridging Lanthanide-Containing Antimono-Seleno-Tungstates.

A series of new trigonal pyramidal {SeO(OH)} bridging lanthanide-containing antimono-seleno-tungstates [HN(CH)]NaCsH[LnSeWO(OH)(HO)(SbWO)(SeWO)(SeSbWO)]·32HO [Ln = Tb (), Dy (), Ho (), Er ()] have been prepared by the synthetic strategy of simultaneously using the antimonotungstate precursor and simple material in an acidic aqueous solution and structurally characterized by single-crystal X-ray diffraction, powder X-ray diffraction, IR spectrometry, and thermogravimetric analysis. Their molecular structures contain an unprecedented hexameric polyoxoanion [LnSeWO(OH)(HO)(SbWO)(SeWO)(SeSbWO)] constituted by two equivalent trimeric subunits LnWO(HO)(SbWO)(SeWO)(SeSbWO) bridged via two μ-{SeO(OH)} linkers. Furthermore, the catalytic oxidation of various aromatic sulfides and sulfur mustard simulant 2-chloroethyl ethyl sulfide (CEES) by compound as the heterogeneous catalyst has been investigated, exhibiting high conversion and selectivity as well as good stability and recyclability.