Synthesis, Crystal Structure And Properties Of Coordinated Complex Based On Keggin-type Germanium Anion Molybdate

This thesis mainly on the basis of building block method and in situ synthesis strategy,viaconventional aqueous solution synthesis strategy and hydrothermal synthesis technology,successfully synthesized4never reported based on Keggin typeGermanium anion molybdate,and through the single crystal X-ray diffraction, infrared spectrum, ultraviolet spectrum,electrochemical, thermogravimetric analysis, magnetic and other properties of these newcompounds have been characterized.1.Via conventional aqueous solution synthesis strategy, germanium dioxide, sodiummolybdate,transition metal salt CuCl2and organic ligand2,6-pyridine dicarboxylic acid asraw materials,successfully synthetizing a new type based on saturated Keggin germaniummolybdate coordination compound1. Formula is as follows:{[GeMo12O40][CuI(pdc)Na(pdc)]2}24H2O(pdc=2,6-pyridine dicarboxylic acid)(1)In the crystal structure of compound1, each GeMo12construction unit eight side ofoxygen is involved in coordination, respectively with four Cu atoms and Na atom ligand, eachNa and Cu atoms with a2,6-pyridine dicarboxylic acid ligand, and each Cu and Na atomswith the two GeMo12oxygen ligand, formed a three-dimensional structure. Studies haveshown that compound1has good photocatalytic activity.2.Using hydrothermal synthesis technique, H4[α-GeMo12O40]·14H2O as precursor, in theorganic ligand1,2,4-three azole nitrogen, we successfully synthesized a three dimensionalstructure compound2. Formula is as follows:[Cu12(trz)8Cl][H3GeMo12O40] H2O(trz=1,2,4-three azole nitrogen)(2)The crystal structure of compound2is based on the Keggin type [GeMo12O40]4-anionsand Cu-trz interspersed with fragments of a two-dimensional supramolecular structurecomposed.3.Using conventional aqueous solution synthesis strategy and hydrothermal synthesistechnology, H4[α-GeMo12O40]·14H2O as precursor, organic ligand N, N-dimethyl formamideand1,10-phenanthroline neighbourhood of organic ligand, successfully synthesized twozero dimensional polymetallic oxygen sour salt compound3,4. Formula is as follows:[GeMo12O40][Cu(DMF)4]25H2O(DMF=N,N-dimethylformamide)(3)[GeMo12O40][Cu(phen)2]26H2O(phen=1,10-phenanthroline)(4)In compounds3and4, every [GeMo12O40]4-anion is coordinated with two Cu atoms, eachCu atoms are five coordination.