Hydrothermal Synthesis And Crystal Structure Of Inorganic-Organic Hybrid Materials Based On Polyoxometalate

Metal inorganic-organic hybrid materials are formed by self-assembly through coordination bonds between bidentate or multibentate organic ligands and central metal ions.The central ion, in general , is transitional metal ion with a definite coordination model, acting as template and organic ligand with many coordination sites, acting as building block.There are tremendous activities these years in the area of inorganic-organic hybrid materials based on polyoxometalate because of their diversified structures and interesting properties, which endows these materials with applications to sorption, catalysis, electrical conductivity and solar energy conversion. In this dissertation, there are four parts. The first part isSuccessfully synthesize inorganic-Organic hybridcompound[Nd(PW₁₁ O₃₉ )(H₂O₃) ](H₂bpy)₂·4H₂O and Gd(bpy)₃PW₁₂ O₄₀·4H₂O,the two compounds is two new kinds of hybridmaterials.The secong part is ,through single crystal analysis,the firstcompound is deposited as one dimensional chain structure, containedprotonated ligands in the structure,and the space group is P(-1) ,belong to triclinic crystal system.The crystal is a kind of onedimensinonal monosubstituted inorganic-organic hybrid material.Thethird part is when the temperature is lower than 253℃,the crystal isstable through TG analysis. Also speculate the crystal structure of Gd(bpy)₃PW₁₂ O₄₀·4H₂O based on crystal theory and information ofpapers.The crystal is also a kind of one dimensionalinorganic-organic hybrid material deposited through(PW₁₂ O₄₀ )^3-,contained bpy molecules in the structure .The fourth partis test the factors affecting the outcome through conditionalexperiments. obtain the probable best condition of the synthesis ofthese two crystals. we determine that the best conditions for the firstcompound is temperature equal to 130℃,pH=6, volume of waterequal to 10-17ml, ratio of reactants equal to 4:4:1。The second istemperature equal to 140℃,pH=6, volume of water equal to10-17ml, ratio of reactants equal to 4:4:1。...