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The Scientific World Journal - Volume 2014 2014, Article ID 845208, 8 pages -

Research ArticleDr. M.A. Kazi Institute of Chemistry, National Center of Excellence in Analytical Chemistry, University of Sindh, Jamshoro 76080, Pakistan

Received 30 August 2013; Accepted 24 October 2013; Published 29 January 2014

Academic Editors: A. Laghzizil and A. Souldozi

Copyright © 2014 Qadeer K. Panhwar and Shahabuddin Memon. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The complex formation between CrIII and morin was carried out in methanol and confirmed by analytical characterization using UV-Vis, IR,

H NMR, and TG-DTA. UV-Vis shows significant bathochromic shift in benzoyl upon coordination as well as IR well illustrates the peak shift of C=O group and formation of a O–CrIII bond. Likewise,

H NMR studies clarify that CrIII metal ion replaces the 5OH proton hence; 5-hydroxy-4-keto site is employed by morin in chelation to form six-membered stable ring system out of three available chelating sites. In addition, TG-DTA denotes the presence of coordinated and crystalline water molecules. The melting point of the complex was found to be 389°C by DSC. In addition, CrIII-morin complex was found to be a more potent antioxidant than morin as evaluated by DPPH• and FRAP methods.





Autor: Qadeer K. Panhwar and Shahabuddin Memon

Fuente: https://www.hindawi.com/



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