36‐Nuclearity Organophosphonate‐Functionalized Polyoxomolybdates: Synthesis, Characterization and Selective Catalytic Oxidation of Sulfides
Qiaofei Xu, Xinmiao Liang, Baijie Xu, Jia‐Wei Wang, Jia‐Wei Wang, Peipei He, Pengtao Ma, Jiwen Feng, Jingping Wang, Jingping Wang, Jingyang Niu
Abstract
Abstract The crown‐shaped 36‐molybdate cluster organophosphonate‐functionalized polyoxomolybdates with the highest nuclearity in organophosphonate‐based polyoxometalate chemistry, (NH 4 ) 19 Na 7 H 10 [Cu(H 2 O)TeMo 6 O 21 {N(CH 2 PO 3 ) 3 }] 6 ⋅31 H 2 O, has been reported for the first time. The synthesized 36‐molybdate cluster was characterized by routine techniques and tested as a heterogeneous catalyst for selective oxidation of sulfides with impressive catalytic and selective performances after heat treatment. High efficiency (TON=15333) was achieved in the selective oxidation of sulfides to sulfoxides, caused by the synergic effect between copper and polyoxomolybdates and the generation of the cuprous species during the heat treatment.