Hydrothermal Synthesis And Characterization Of Structure Of Organic-inorganic Hybrid Based On Cu-complexes And Polyoxotungstate Cluster Units

In this thesis, three compounds based on pre-prepared classical polyoxometalates (POMs) and transition metal copper complexes with different chelating and bridging N-ligands have been synthesized under hydrothermal reaction conditions, and these compounds have been characterized by single cystal X-ray diffractions, IR, TG and elemental analysis.Compound 1 has been prepared by using Lindqvist-type polyoxometalate as polyanion and [CuII(phen)2Cl]22+ as countercations. They are hold together only by hydrogen bonding interactions. In their packing arrangement, a three-dimensional supramolecular network is established.Compound 2 was composed of oneα-Keggin unit, one [Cu(en)2]+ coordination cation, two protonated ethylenediamine molecular ions and two water molecules. Polyoxoanions form into infinite one-dimensional chains by sharing terminal oxygen atoms, such one-dimensional chains pack into three-dimensional network with one-dimensional dumbbell channels. Polyoxoanions chains, [CuI(en)2]+ and protonated ethylenediamine molecular ions form an organic-inorganic supramolecular compound by complex hydrogen bonding interactions.Compound 3 is a novel Wells–Dawson polyoxoanion supported by six copper(I) complex fragments with imidazole ligands in one'polar'and five'equator'positions, which is bridged through W–O–Cu(5)–O–W linkages to build 1D infinitely linear chain structure by alternate Wells–Dawson polyoxoanions and bridging coordination cation [Cu(imi)2]+ in the polymer. Such one-dimensional infinite linear chains are further assembled into three-dimensional networks via hydrogen bonding interactions.