PREPARATION, SPECTRAL CHARACTERIZATION AND ANTIOXIDANT POTENTIAL OF COMPLEXES BETWEEN METAL CATIONS AND QUERCETIN

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Dehghazade Ali; SHAGHAGHI MASOOMEH; DEHGHAN GHOLAMREZA

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Seminar: IRANIAN CHEMISTRY CONGRESS
Year:2013 | Issue:16

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Title

PREPARATION, SPECTRAL CHARACTERIZATION AND ANTIOXIDANT POTENTIAL OF COMPLEXES BETWEEN METAL CATIONS AND QUERCETIN

Author(s)

Dehghazade Ali | SHAGHAGHI MASOOMEH | DEHGHAN GHOLAMREZA | Issue Writer Certificate

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Abstract

FLAVONOIDS ARE A GROUP OF POLYPHENOLICE COMPOUNDS WIDELY DISTRIBUTED IN THE MEDICINAL PLANTS, VEGETABLES AND FRUITS. FLAVONOIDS ARE BENEFICIAL EFFECTS ON HUMAN HEALTH, INCLUDING CARDIOVASCULAR PROTECTION AND ANTICANCER ACTIVITY. ALSO MOST OF THEM ARE STRONG METAL CHELATORS. QUERCETIN (Q), AS A MOST FAMOUS METAL CHELATING AGENT, BELONGS TO FLAVONOIDS WITH A STRONG ANTIOXIDANT ACTIVITY. CHELATION THERAPY IS ONE OF THE COMMON METHODS FOR REMOVING TOXIC HEAVY METALS, SUCH AS LEAD, CUPPER, TIN, COBALT AND …, FROM THE BODY. THE AIM OF THIS STUDY WAS TO PREPARE COMPLEXES BETWEEN Q AND SOME METAL IONS SUCH AS FE (II), FE (III), CO (II), NI (II), CU (II), ZN (II), CD (II), PB (II), SN (II) AND TO DETERMINE ANTIOXIDANT ACTIVITY OF THE COMPLEXES IN COMPARISON WITH FREE Q.Q-METAL COMPLEXES WERE PREPARED BY A DIRECT REACTION OF Q.2H2O USING METHANOL AS A REACTION MEDIUM. TO FIND STOICHIOMETRIC RATIO BETWEEN Q AND METAL CATIONS OF CONTINUOUS VARIATION (JOB’S METHOD) WAS APPLIED BY PLOTTING ABSORBANCE VERSES MOLE FRACTION. ANTIOXIDANT ACTIVITY OF FREE Q AND Q-METAL COMPLEXES WERE EVALUATED USING 2, 2-DIPHENYL- 1- PICRYLHYDRAZYL (DPPH) RADICAL SCAVENGING ACTIVITY AND FERRIC REDUCING ANTIOXIDANT POWER (FRAP).WHEN THE SOLUTION OF METAL CATIONS WERE ADDED, MAXIMUM ABSORPTION BAND OF FREE Q (372 NM) SHIFTED TO A LONGER WAVELENGTHS, ACCOMPANIED WITH SLIGHT DECREASE IN ABSORPTION. SIMULTANEOUSLY, A NEW STRONGER ABSORBANCE PEAK APPEARED AT 400-460 NM THE RESULTS INDICATED THE FORMATION OF A COMPLEX BETWEEN Q AND METAL CATIONS. STOICHIOMETRIC RATIO BETWEEN Q AND CATIONS WERE; 3: 2, 2: 3, 2: 1, 2: 1, 1: 1, 1: 1, 1: 1 AND 2: 1 FOR SNCL2, ZNCL2, COCL2.6H2O, FECL3, FECL2.4H2O, PB (NO3) 2, NICL2.6H2O, CD (NO3) 2.4H2O, CUCL2.2H2O RESPECTIVELY.THE FREE RADICAL SCAVENGING ACTIVITY OF THE Q WAS AFFECTED BY METAL COMPLEXATION. IN SOME CASES ANTIOXIDANT ACTIVITY OF FREE Q WAS GREATER THAN Q-METAL COMPLEX, BUT IN THE OTHERS COMPLEX FORMATION INCREASED ANTIOXIDANT POTENTIAL OF Q. OUR DATA INDICATED THAT Q IS A STRONG CHELATOR AGENT FOR METAL CATIONS AND ITS ANTIOXIDANT ACTIVITY CAN BE CHANGE BY COMPLICATION.

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APA: Copy

Dehghazade, Ali, SHAGHAGHI, MASOOMEH, & DEHGHAN, GHOLAMREZA. (2013). PREPARATION, SPECTRAL CHARACTERIZATION AND ANTIOXIDANT POTENTIAL OF COMPLEXES BETWEEN METAL CATIONS AND QUERCETIN. IRANIAN CHEMISTRY CONGRESS. SID. https://sid.ir/paper/914436/en

Vancouver: Copy

Dehghazade Ali, SHAGHAGHI MASOOMEH, DEHGHAN GHOLAMREZA. PREPARATION, SPECTRAL CHARACTERIZATION AND ANTIOXIDANT POTENTIAL OF COMPLEXES BETWEEN METAL CATIONS AND QUERCETIN. 2013. Available from: https://sid.ir/paper/914436/en

IEEE: Copy

Ali Dehghazade, MASOOMEH SHAGHAGHI, and GHOLAMREZA DEHGHAN, “PREPARATION, SPECTRAL CHARACTERIZATION AND ANTIOXIDANT POTENTIAL OF COMPLEXES BETWEEN METAL CATIONS AND QUERCETIN,” presented at the IRANIAN CHEMISTRY CONGRESS. 2013, [Online]. Available: https://sid.ir/paper/914436/en

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