title: Synthesis of Cr(III)-morin complex: characterization and antioxidant study.
abstract: The complex formation between Cr(III) and morin was carried out in methanol and confirmed by analytical characterization using UV-Vis, IR, (1)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-Cr(III) bond. Likewise, (1)H NMR studies clarify that Cr(III) 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, Cr(III)-morin complex was found to be a more potent antioxidant than morin as evaluated by DPPH• and FRAP methods.
authors.affiliation: Dr. M.A. Kazi Institute of Chemistry, National Center of Excellence in Analytical Chemistry, University of Sindh, Jamshoro 76080, Pakistan.
authors.forename: Qadeer K
authors.initials: QK
authors.lastname: Panhwar
authors.affiliation: Dr. M.A. Kazi Institute of Chemistry, National Center of Excellence in Analytical Chemistry, University of Sindh, Jamshoro 76080, Pakistan.
authors.forename: Shahabuddin
authors.initials: S
authors.lastname: Memon
mesh_terms: D000975:Antioxidants / Q000138:chemical synthesis* / Q000737:chemistry; D002857:Chromium / Q000737:chemistry*; D017608:Chromium Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D056831:Coordination Complexes / Q000138:chemical synthesis* / Q000737:chemistry; D047309:Flavones / Q000138:chemical synthesis* / Q000737:chemistry; D005419:Flavonoids / Q000138:chemical synthesis* / Q000737:chemistry
chemical_list: D000975:Antioxidants; D017608:Chromium Compounds; D056831:Coordination Complexes; D047309:Flavones; D005419:Flavonoids; C000593229:bis(morin)chromium(III); D002857:Chromium; C008548:morin