Syntheses,Structures And Properties Of Lanthanide Or Transition Metal-containing Organophosphonate-based Polyoxotungstates

Polyoxometalates（POMs）are well-known metal-oxo clusters,which not only show the adjustable structures and sizes,but also possess the abundant surface oxygen atoms,strong coordination ability,attractive thermostability,high proton-acid property and some other characteristics.Organophosphonates are an important kind of organic ligands with the potential applications in materials,medicine and catalysis,owing to their various structures,wide varieties as well as very rich coordination modes.Therefore,the synthesis of organophosphonates-based POMs with novel structure and good property has widely potential applications.By regulating the reaction conditions,six members of lanthanide（Ln）-containing organophosphonate-based polyoxotungstates（POTs）and a family of transition metal（TM）-containing organophosphonate-based POTs have been synthesized.The title compounds in this master degree thesis were characterized by X-ray single crystal diffraction,X-ray powder crystal diffraction,IR spectra,UV spectra,thermogravimetric analyses,elemental analyses,X-ray photoelectron spectroscopy,magnetic and fluorescent properties.The main contents of this dissertation listed as follows:I.Six members of Ln-containing HEDP-functionalized POTs have been successfully synthesized in aqueous by the reaction of K₁₄[As₂W₁₉O₆₇（H₂O）],HEDP and Ln chloride.II.By the mixing of K₁₄[As₂W₁₉O₆₇（H₂O）],glyphosate and TM-chloride,three novel TM-containing glyphosate-functionalized POTs have been obtained in aqueous solution.III.A new TM-containing glyphosate-functionalized POT has been presented by the reaction of Na₂₄[H₆Se₆W₃₉O₁₄₄]·74H₂O,glyphosate and TM-chloride.