首页|Parallelogram 3d-4f-5d heterometallic clusters based on trilacunary tungstoantimonates with excellent proton conductivity
Parallelogram 3d-4f-5d heterometallic clusters based on trilacunary tungstoantimonates with excellent proton conductivity
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Two 3d-4f-5d heterometallic cluster-containing polyoxometalates,formulated as Na22{(SbW9O33)4[La3W6MO18(H2O)8(CH3COO)4]2}.nH2O(abbreviated as La6M2,M=Co/Mn)were synthesized and struc-turally characterized.Single-crystal X-ray diffraction analyses reveal that the polyanions of La6Co2 and La6Mn2 consist of the uncommon 3d-4f-5d clusters {La6W12Co2} and {La6W12Mn2},which are encapsu-lated by four trilacunary Keggin tungstoantimonates to form the parallelogram-shaped title compounds.Additionally,the polyanions can be extended into a two-dimensional(2D)frame by the linkage of periph-eral Na+ions.The inner space of the 2D layer was filled with water molecules and thus an H-bonded network was formed,which is expected to exhibit a fascinating proton conductivity.The study of water-assisted proton conduction demonstrated that La6Co2 and La6Mn2 were temperature-and humidity-dependent proton conductors,respectively,and the proton conductivities could reach 1.3 × 10-2 and 2.3 × 10-2 S/cm at 65 ℃ and 90％RH conditions.
Henan Key Laboratory of Polyoxometalate Chemistry,College of Chemistry and Molecular Sciences,Henan University,Kaifeng 475004,China
School of Pharmaceutical Science & Yunnan Key Laboratory of Pharmacology for Natural Products,Kunming Medical University,Kunming 650500,China
Collaborative Innovation Center of Chemistry for Energy Materials,State Key Laboratory of Physical Chemistry of Solid Surface and Department of Chemistry,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,China
国家自然科学基金Excellent Youth Science Fund Project of Henan Province河南省自然科学基金Henan UniversityState Key Laboratory of Physical Chemistry of the Solid Surface of Xiamen University
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