Study On Hybrid Compounds Based On Keggin-Type Polyoxometalates

Polyoxometalate (Polyoxometalates, POMs) cluster compounds formed by transition metal ions which link with the oxygen atom on the octahedral. Owing to their novel topology and nature, having wide range of applications in materials chemistry, catalysis chemistry, medicinal chemistry and other fields. Simultaneously, more and more chemical researchers are attracted to throw oneself into it. Supramolecular chemistry as an emerging edge of science, penetrate with organic chemistry, inorganic chemistry, biochemistry and materials chemistry for each other. It emphasizes on the specific structural and functional supramolecular systems, thereby should build a firm bridge for molecular devices, materials science,information science, environmental sciences and life sciences.In this thesis, we use the idea of molecular design, successfully prepare two based Keggin-type of polyoxometalate for inorganic-organic hybrid supramolecular compounds,[(C2H3N3)3H3(CuW12040)]·6H20(1) and [(C2H3N3)2H3(PW12O40)]·2H20(2)[C2H3N3=(1-H-1,2,4-triazole)] by hydrothermal synthesis method. Both transition metal copper located in the center of Keggin-type tungstate and Keggin-type polytungstate play the part of inorganic building units which have rich oxygen atoms, triazole act as polydentate rigid organic ligands.Single-crystal X-ray diffraction analysis showed that compound1belong to triclinic system, space group is P-1with unit cell parameters a=13.175(1)A, b=13.251(2)A, c=13.295(3)A,a=85.96(4)°,(3=86.01(5)°, y=86.10(6)°,V=4537.19(1)A3. a=13.294(5)A, b=18.039(5) A, c=19.311(2)A, a=89.667(6)°,p=84.499(7)°,γ=89.945(9)°, V=4537.19(1)A3;compound2belong to trigonal system, space group is R-3with the crystal data a=17.984(7)A, b=17.980(2)A, c=24.387(9)A, a=89.95(2)°, β=90.07(4)°,γ=119.97(8)°,V-4733.82(6)A3.