Kong Hui, Xu Baijie, Zhen Jing, Liu Siyu, Li Keli, Ma Pengtao, Wang Jingping, Niu Jingyang
Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China.
Inorg Chem. 2021 Oct 4;60(19):14872-14879. doi: 10.1021/acs.inorgchem.1c02235. Epub 2021 Sep 17.
A novel organodiphosphonate-based telluromolybdate cluster, (NH)NaH[TeMoO(CoMoOL)]·11HO [; L = (OP)C(O)(CH)NH], has been successfully synthesized by a simple one-pot aqueous reaction. Intriguingly, the [TeMoO] subunit with tetrahedral geometry of TeO is observed in the organophosphonate-functionalized polyoxometalates for the first time. Compound was prepared in a buffer solution (pH = 5.5) with alendronic acid (Ale) and (NH)MoO·4HO as raw materials. The polyanion [TeMoO(CoMoOL)] was constructed from four {MoOL} subunits encapsulating an interesting Te-Mo heterometal subunit [TeMoO] through four CoO octahedra and has been fully characterized by routine techniques. In addition, compound , as a heterogeneous catalyst, shows good conversion (92%) and high selectivity (99%) for Knoevenagel condensation reaction.
一种新型的基于有机二膦酸盐的碲钼酸盐簇合物(NH)NaH[TeMoO(CoMoOL)]·11HO [；L = (OP)C(O)(CH)NH]，已通过简单的一锅水相反应成功合成。有趣的是，首次在有机膦酸盐功能化的多金属氧酸盐中观察到具有TeO四面体几何结构的[TeMoO]亚基。化合物 以阿仑膦酸（Ale）和(NH)MoO·4HO为原料，在缓冲溶液（pH = 5.5）中制备。聚阴离子[TeMoO(CoMoOL)]由四个{MoOL}亚基通过四个CoO八面体包裹一个有趣的Te-Mo异金属亚基[TeMoO]构成，并已通过常规技术进行了全面表征。此外，化合物 作为一种多相催化剂，对Knoevenagel缩合反应显示出良好的转化率（92%）和高选择性（99%）。
