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SM ISO690:2012 GUŢUL, Tatiana, RUDI, Ludmila, CEPOI, Liliana, MÎRZAC, Alexandra, PETRENKO, Piotr, REVENCO, Mihail. The study of antioxidant activity of polyoxometalates containing crown ethers. In: Microbial Biotechnology, 12-13 octombrie 2016, Chișinău. Chișinău, Republica Moldova: Institutul de Microbiologie şi Biotehnologie, 2016, Ediția 3, p. 182. |
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Microbial Biotechnology Ediția 3, 2016 |
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Conferința "Microbial Biotechnology" Chișinău, Moldova, 12-13 octombrie 2016 | |
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Pag. 182-182 | |
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Teza |
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Polyoxometalates (including heteropolyoxometalates and isopolyoxometalates) are oligomeric aggregates of transition-metal cations (so-called polyatoms, usually the species V(V), Nb(V),Ta(V), Mo(VI), and W(VI)) bridged by oxide anions [1]. Polyoxometalates (POMs) are remarkable for their molecular and electronic structural diversity and promising for catalysis [2]. POMs are discrete early transition metal oxides with a variety of compositions and structures and manifold properties, which give rise to potential applications in different areas. In addition to the design and synthesis of well-defined polynuclear clusters, POMs have also received considerable attention for biological applications, such as inhibitors of enzymes and bacteria. They exhibit interesting biological effects mainly related to their antiviral and antitumor properties. One of the most active directions in the chemistry of polyoxometalates (POM) is the study of supramolecular complexes, where POM are used as inorganic component, and those complexes, which are based on POM and crown ethers, attract special attention. The recent studies show the prospects of the organo-inorganic hybrid assemblies with POM and crown ethers as biologically active compounds. We have synthesized and studied by ABTS method polyoxometalates composition Na10[Cu3(Se2W9O33)2(H2O)3]21H2O (1),Na10[Cu3(Te2W9O33)2(H2O)3]19 H2O (2) and supramolecular complexes with crown-ether-(18C-6) Na10[Cu3(Se2W9O33)2(H2O)3]21H2O (1), Na10[Cu3(Te2W9O33)2(H2O)3]19H2O (2) and 18-crown-6 ether. This complex was structurally characterised by X-ray analysis, and its formula was determined as Na0.33(NaÌ(C12O6H24))6.66[N a3(H2O)6Cu3(W9O33Se)2]·C12O6H24·8.75(H2O) (3), {Na6Cu3Te2W18(H3O)O90}·3(18C6)·nH2O (4). In this research, we bring out for the first time a novel supramolecular complex based on the POM with composition mentioned above. We proved that the antioxidant activity of supramolecular complexes containing crown ethers is two times higher with respect to the original complexes. |