Electrochemical oxidation mechanisms of the antioxidants daidzein and 7-Hydroxy-4-chromone

Fernandes, I. P. G ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1002/elan.201100629
  3. Abstract:
  4. The electrochemical behavior of antioxidants daidzein (DZ) and 7-hydroxy-4-chromone (7-OH-4-CHM) was investigated. The oxidation of DZ is irreversible, pH-dependent, and occurs in two steps, the first of 4′-OH on the B-ring and the second on the 7-OH on the A-ring. The oxidation of 7-OH-4-CHM occurs on the 7-OH on the A-ring, is irreversible, pH-dependent and proceeds in a single step. The DZ diffusion coefficient was calculated in pH7.0 phosphate buffer to be D DZ=8.1×10 -5cm 2s -1. The detection limits of DZ and 7-OH-4-CHM was calculated as LOD DZ=0.08μM and LOD 7-OH-4-CHM=0.13μM
  5. Keywords:
  6. Antioxidant activity ; Daidzein ; Flavonoids ; Glassy carbon electrode ; Oxidation
  7. Source: Electroanalysis ; Volume 24, Issue 3 , 2012 , Pages 618-626 ; 10400397 (ISSN)
  8. URL: http://onlinelibrary.wiley.com/doi/10.1002/elan.201100629/abstract;jsessionid=76F80969BDC8EB6F7E524DE1D45380E6.f03t04?systemMessage=Wiley+Online+Library+will+be+unavailable+on+Saturday+27th+February+from+09%3A00-14%3A00+GMT+%2F+04%3A00-09%3A00+EST+%2F+17%3A00-22%3A00+SGT+for+essential+maintenance.++Apologies+for+the+inconvenience