Synthesis,Crystal Structure And Properties Of Hybrid Materials Based On Keggin-type Phosphomolybdate

Under hydrothermal condition, ten novel organic-inorganic hybrid materials basedon Keggin-type phosphomolybdate have been synthesized under controlled conditionsof the temperature, time, pH and so on.The chemical formulas of compounds have been determined by elemental analysesand TG analysis:（H₂bpy）_1.5[PMo₁₂O₄₀]·1.5H₂O1[（phen）₄Cu₂(PMo₁₂O₄₀)][（phen）₂Cu(PMo₁₂O₄₀)]₂[PMo₁₂O₄₀][（phen）₂Cu（H₂O）]₂·4H₂O₂（H₂bpi）（Hbpi）[PMo₁₂O₄₀]3（Hbpi）（H₂bbi）[PMo₁₂O₄₀]4（H₂bbi）（Hbbi）[PMo₁₂O₄₀]5（H₂bbi）（Hbbi）[PMo₁₂O₄₀]·2H₂O6Cu₃（bei）₆[PMo₁₂O₄₀]₂·6H₂O7[Cu^Ⅰ（pz）]₃[PMo^Ⅵ12O₄₀]8[Cu^Ⅰ（pz）_1.5]₄[PMo^ⅤMo^Ⅵ11O₄₀]·pz·2H₂O9[Cu₃^Ⅰ（pz）₃Cl][Cu^Ⅰ₂（pz）₃（H₂O）][PMo^ⅤMo^Ⅵ₁₁O₄₀]10The new compounds are structurally characterized by single crystal X-raydiffractions and IR. Compounds1-7are organic-inorganic supramolecular compounds,compounds8-10are organic-inorganic hybrid compounds. For compound1, H₂bpybridges two H₂O via H-bond to form criss-cross chains along a, b, and c axis, whichgive rise to cubic-like chambers and [PMo₁₂O₄₀]^3-polyanions are embedded in it.Compound2exhibits a novel3D supramolecular framework, in which there exists threekinds of Keggin-type phosphomolybdate with different coordination mode. Compound3-7exhibit different3-D supramolecular network via similar H-bond interactions forconformational changes of flexible ligands bei, bpi or bbi. Compound8-10exhibitunusual3D Cu^Ⅰ–pz/Cu^Ⅰ–pz–Cl frameworks, into which PMo₁₂O₄₀^n-are incorporated toform three kinds of3D structures.The study of electrochemical properties of the compounds1-10indicated that all ofthem had the redox property. Additionally, compounds1-10have good electrocatalytic activity for the reduction of H₂O₂.Additionly, the fluorescent properties of compounds1-10have been investigated,indicating that compounds1，3-10have good fluorescent properties.