Transition metal-doped high-nuclear polyoxovanadates constructed from tetragonal building blocks
The design and synthesis of high-nuclear polyoxometalates(POMs)utilizing secondary building blocks(SBB)is attractive and challenging.Herein,four new high-nuclear polyoxovanadates(POVs),{V20S2In42P12(CO2)}(1),{V20Mo2In4P12(C2O4)2}(2),{V12P6SPb2}(3)and {V12P6SCd2}(4),were successfully synthesized under solvothermal conditions by incorporating transition metals into POVs.All the structures are constructed from the tetragonal {V5(PhPO3)4} SBB,wherein five {VO5} square pyra-mids are interconnected by edge-sharing modes,and four phenylphosphonic acid ligands further coordinate with vanadium cations.Compounds 1 and 2 have similar structures in which two {V10(PhPO3)6(SO4)In2}or {V10(PhPO3)6(MoO4)In2} clusters are bridged by formate or oxalate ligands.While compounds 3 and 4 are constructed from {V12(PhPO3)6(SO4)} cluster doped with transition metals Pb or Cd.Notably,compound 4 demonstrated efficient catalytic activity for sulfide oxidation.
polyoxometalatepolyoxovanadatesecondary building blockcatalysissulfide oxidation
NETL
NSTL
万方数据
