Hydrothermal syntheses, crystal structures, and properties of two polyoxometalates [Cd(2,2′-bpy)3]2[PMoVMoVI
11O40] and [H3PMo12O40]·3(4,4′-bpy)·4H2O |
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Authors: | Ting-Yan Lan Jian-Xin Chen Xiu-Qing Lü Yuan-Biao Huang Zhong-Shui Li Chun-Xia Wei Zhi-Chun Zhang |
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Institution: | (1) College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, 350007, P. R. China; |
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Abstract: | Two Keggin-type phosphododecamolybdate compounds Cd(2,2′-bpy)3]2PMoVMoVI
11O40] (1) and H3PMo12O40]·3(4,4′-bpy)·4H2O (2) (bpy=bipyridine) were prepared by the hydrothermal method for the first time and characterized by elemental analyses, X-ray
single-crystal diffraction, ESR spectra, and IR spectra, showing that compound 1 consists of a mixed valence Keggin polyanion PMoVMoVI
11O40]4− and two isolated coordinated cations Cd(2,2′-bpy)3]2+, while compound 2 is an intermolecular compound based on organic substrate 4,4′-bpy and heteropoly acid unit H3PMo12O40. Furthermore, both the compounds show strong photoluminescence properties in the solid state at room temperature. The catalytic
activities of the two compounds were also determined by the oxidation of benzaldehyde to benzoic acid using H2O2 as oxidant in a liquid–solid triphase system. |
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