Hydrothermal Synthesis And Characterization Of The Inorganic-Organic Complexes Based On Polyoxotungstate

In this thesis, several supermolecular compounds based on classical polyoxometalates (POMs) and organic compound of triethylene tetramine and phenanthroline have been synthesized via self-assembly under hydrothermal reaction conditions and normal temperature condition, and characterized by IR, TG-DTA,X-ray single crystal diffraction and variable temperature magnetic susceptibility. The physical and chemical properties of these compounds, such as thermal stabilities and magnetic behaviors, have also been researched in detail. These compounds are below:[H2en]4[SiNaW11O39]Cl·2H2O in the space group P2(1) of the monoclinic system with a=12.8125(8) ?, b=11.1568(7) ?, c=16.6436(11) ?,β=91.234(1)°, V=2378.6(3) ?3, Z=2。[{Mn(phen)2H2O} 2SiW12O40] 2H2O in the space group P-1of the triclinic system with a=10.956(5)?, b=13.484(5) ?, c=13.671(5)?,β=71.334(5)°, V=1776.3(12)?3, Z=2. R1=0.0608,wR2 =0.1374[(I >2σ(I))]。R1=0.0583, wR2 =0.1155[(I >2σ(I))]。[C6H12N5O]3[(PO4)Mo12O36].6H2O. in the space group P212121 of the orthorhombic system with a=14.3502(7)?, b=15.4580(7) ?, c=27.1062(13)?, V=6012.8(5)?3, Z=4。R1=0.0364,wR2 =0.0694[(I >2σ(I))]。In compounds 1, the 1D polyoxoanion chain is formed by sharing of a oxygen atom between Na+ in monosubstituted Keggin anions and tungsten atom in another anion. Between the chains there are more than one kinds of hydrogen bonds which are mainly responsible for the three dimensional supramolecular architecture.Compounds 2 is composed of the polyoxoanion [SiW12O40]4- and one pair of opposite covalently linked [Mn(phen)2H2O]2+transition metal complex fragments, and a infinite 3D supramolecular is obtained via hydrogen-bonding interactions and van der Waals forces . The thermal decomposition procedure of the compound is inferred and includes a carbonization-oxidation reaction of organic contents.Compound 3 consists of one discrete anion [PMo12O40]3-, six water molecules and three (1H-tetrazole-5-yl)methylmorpholiniums. In the stabilization of compound hydrogen bonds interactions play an important role...