Synthesis, Characterization and Antioxidant Activity of Rutin Complexes
نویسندگان
چکیده
Received 25 August 2014, Revised 08 December 2014, Accepted 10 December 2014 -------------------------------------------------------------------------------------------------------------------------------------------Abstract Rutin, one of the excellent chelating agents, has been made to react with Zr and MoO4 ions to get metal complexes in methanol. The synthesis, spectral properties (UV-Vis, H NMR, C NMR, IR), thermal behavior and antioxidant activity of these complexes have been studied. It has been observed that rutin forms deep yellow colored complexes of mononuclear composition (through 5OH-4CO system in case of Zr/catechol site in case of MoO4) having stoichiometry, 1:2 and 1:1 for Zr and MoO4 ions, respectively. It has been further noticed that these complexes are formed at different pHs, i.e. 4.0 and 8.0 pHs suitable for Zr and MoO4 complexes, respectively. Thermograms also confirm the results of IR and support the presence of water molecules in complexes. Relative antioxidant activity of the rutin ligand, zirconium-rutin and molybdenumrutin complexes was determined. It was found that both metal complexes have higher antioxidant activity than rutin alone.
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