| Polyoxovanadates?POVs?, an important family number of POMs, have potential applications in the fields of chemistry, biology and medicine.Vanadium-containing metal-oxygen clusters have received much attention due to a variety of different structural motifs and fine-desired properties. One of the remarkable approach in the design of inorganic-organic hybrid compounds is to construct organic/organic-metal units modified vanadium-containing metal-oxygen clusters. This strategy is anticipated to affect the crystal structure and obtain complexes with high-dimension structure, which shpuld lead to new functional materials.In this paper, POMs-based organic-inorganic componds 1-15 have been synthesized by introducing specific functions of organic/metal- organic units and characterized by element analysis, IR spectroscopy, UV spectroscopy, PXRD and complete single crystal structure analyses. Futhermore, the properties of related compounds like electrochemical, magnetic properties and catalytic degradation of organic dyes were investigated. The main tasks are as follow:1. Five new inorganic-organic hybrid compounds based molybdovanadate cluster with heteroatom As, H8{As?3Mo6V3O36?As?O2?} {4,4?-bpy}3·5H2O?1?,?4,4?-bpyH? [{Mn??4,4?-bpy?2}2{As?Mo8V8O44}]·9H2O?2?, {Ni?2,2-bpy?3}2{?AsO4?Mo6V6O32?AsO2?4}·6H2O?3?, {Cu??2,2?-bpy?2}[{Cu??2,2?-bpy?2}2 {As?Mo8V4O36?As?O2?2}]·7H2O?4? and?4,4?-H2bpy?2.5{As?Mo8V4O36?As?O2?2}·7H2O?5? have been synthesized under hydrothermal method by introducing 2,2?-bpy, 4,4?-bpy and transition metal ions as raw material. Compound 1 is the first example of non-Keggin structure in the filed of molybdovanadate cluster with heteroatom As. Compound 2 displays a rare 3D framework containing about 16×16 ? for pores. Compound 3 is the first example of tetra-capped with As atom in Keggin Structure. Compounds 4 and 5 both have bicapped with As atom based on Keggin POM. All of them have been characterized by element analysis, UV-Vis, IR, powder X-ray diffractions and X-ray single crystal diffraction. Futhermore, the properties of electrochemical, semiconductor and magnetic have been studied, respectively.2. Two new inorganic-organic hybrid compounds H2{[Ni?2,2?-bpy?2?H2O?]8[Mo8V8O43?SO4?]2 [Ni?2,2?-bpy?2?H2O?]2[Mo8V8O43?SO4?][Ni?2,2?-bpy?2?H2O?]2[Mo8V8O38?SO4??VO2?2]}·3H2O?6? and [Mo2Fe2O8?4,4?-bpy?2]·6H2O?7? have been synthesized under hydrothermal method by changing reaction condition. Compound 6 contains two types of POM units and three supportted models. Compound 7 repersents a rare type of 3D porous framework based on molybdoiron units. Electrochemical, semiconductor and magnetic properties were measured. Compounds 6 and 7 have been characterized by element analysis, UV-Vis, IR, powder X-ray diffractions and X-ray single crystal diffraction.3. Three organic–inorganic hybrid compounds based arsenic–vanadium clusters, Cu??2,2?-bpy?2}4 {?-As8V14O42?H2O?}?8?, H5[??C4H8N2??CH2C5H4N?2??C4H8N2??CH2C5H4N?] [?-As8V14O42Cl]·10H2O?9? and {?Butyl?4N}4{As8V12O40?N2H4?}?10?, have been synthesised with hydrothermal mothed and conventional method of aqueous solution containing difference template agent for H2O, Cl- and N2H4 in arsenic–vanadium clusters, respectively. Moreover the template agent N2H4 has never been reported. Compounds 8, 9 and 10 have been characterized with element analysis, UV-Vis, IR, powder X-ray diffractions and X-ray single crystal diffraction and tested with electrochemical and magnetic properties.4. Compounds 11-15 [CnMIm]4{As8V12O40?N2H4?}?n = 2, 3, 5, 6, 7? have been prepared by introducing saturated alkyl chain with the numbers of carbon atoms of n, respectively, and characterized by element analysis, UV-Vis, IR and TG analysis. The study of photocatalytic behaviours shows that compounds 11-15 have better photocatalytic degradation activity for RhB. |
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