期刊
JOURNAL OF COORDINATION CHEMISTRY
卷 65, 期 7, 页码 1130-1143出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/00958972.2012.668617
关键词
Zirconium; Molybdenum; Morin; Antioxidant; Fluorescent
资金
- National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, Pakistan
Morin, an excellent chelating agent, has been used to form complex with a metal cation (Zr-4(+)) and a metal oxyanion (MoO42-), isolating highly colored [Zr(C15H9O7)(2)(NO3)(2)]center dot 2H(2)O (1) and [MoO3(C15H9O7)(2)]center dot 3H(2)O (2). The structures were elucidated using different techniques (i.e., electrical conductance, elemental, and thermal analyses) as well as a series of spectroscopic techniques (i.e., UV-Vis, IR, and H-1 NMR). The stoichiometry of the complexes is 1:2, confirmed by the molar ratio method. Zr-4(+) is useful for structural diagnosis of different flavonoids. The preferred site of complex formation of morin is the 3-hydroxy-4-keto system. Complex 2 is more stable than 1. Fluorescence and cyclic voltammetry were studied. Antioxidative study affirmed that both 1 and 2 are efficient antioxidants relative to morin.
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