Synthesis and properties of zirconium(IV) and molybdate(II) morin complexes.

Panhwar, QadeerK.; Memon, Shahabuddin

Morin, an excellent chelating agent, has been used to form complex with a metal cation (Zr4 ) and a metal oxyanion ( ), isolating highly colored [Zr(C15H9O7)2(NO3)2] · 2H2O (1) and [MoO3(C15H9O7)2] · 3H2O (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 1H NMR). The stoichiometry of the complexes is 1 : 2, confirmed by the molar ratio method. Zr4 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.

COMPLEX compounds synthesis; TRANSITION metal complexes; MORIN; CHELATING agents; THERMAL analysis; NUCLEAR magnetic resonance spectroscopy; CHEMICAL structure; ANTIOXIDANTS

Journal of Coordination Chemistry, 2012, Vol 65, Issue 7, p1130

0095-8972

Academic Journal

10.1080/00958972.2012.668617