The Syutliesis、Structure And Properties Of W/Nb-POMs Based Inorganic-Organic Hybrid Materials

A series of novel inorganic-organic hybrid materials based W/Nb were successfullysynthesized under conventional aqueous solution and hydrothermal method. In addition, thestructure and properties were studied.1. A {Ni7} cluster-substituted sandwich-type inorganic-organic hybrid material wassynthesized using the conventional aqueous solution method,Na10(NH4)4[{(β-α-PW9O34)Ni3(OH)(H2O)2(HAle)}2Ni]·22H2O (1)Compound1represents the first nickel-containing sandwich-type polyoxometalatefunctionalized by bisphosphonate ligands. Further, the sandwich-type polyoxoanionsaggregated via the H-bonding interactions into a two-dimensional (2D) supramolecularframework.2． Four novel heteropolyoxonibate-based inorganic-organic hybrid materials weresuccessfully synthesized under hydrothermal condition,{Cu(en)2}6{GeNb12VIV2O42}·20H2O (2){Cu(en)2}3K2Na4{GeNb12VIV2O42}·23H2O (3){Cu(en)2}6{SiNb12VIV2O42}·18H2O (4){Cu(en)2}3K2Na4{SiNb12VIV2O42}·21.5H2O (5)They were composed of polyoxoanion [TNb12O40]16-(T=Si, Ge) and [Cu(en)2]2+buildingblocks. The polyoxoanion [TNb12VIV2O40]12(T=Si and Ge) represents the firstvanadium-capped TIV-centered HPON cluster and can be best described as a α-Keggin core[TNb12O40] with two [VO] units capping on its two “opened windows”. In these fourvanadium-capped HPON compounds, the2/4，3/5are isostructural respectively. Compounds2and4are represent a promising structural model towards core–shell nanostructures, while3and5are typical supporting frames, enriching the structural diversity of HPON chemistry.Antitumor and electrochemical study indicates that compounds2-5exhibit effective antitumoractivity against SGC7901cells and HepG2cells, and could keep the structural integrity in thisprocess.