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has been cited by the following article:

• TITLE: The Application of Novel Electrochemical Approach to Antioxidant Activity Assay of Metal Porphyrins with Bulky 3,5-Diisobornyl-4-hydroxyphenyl Moieties

  AUTHORS: Tatyana Rocheva, Vladimir Tyurin, Dmitrii Belykh, Аnna Moiseeva, Jingwei Zhang, Еvgeny Buravlev, Irina Chukicheva, Alexander Alexander Kutchin, Elena Milaeva

  KEYWORDS: Metal Porphyrins, Cyclic Voltammetry, Rotating Disk Electrode, 2, 2’-Diphenyl-1-picrylhydrazyl, Antioxidant Activity

  JOURNAL NAME: American Journal of Analytical Chemistry, Vol.5 No.15, November 13, 2014

  ABSTRACT: The complexes of biogenic metals (Zn2+,Cu2+,Co2+,Mn3+,Fe3+) based on meso-tetra(3,5-diisobor- nyl-4-hydroxyphenyl)porphyrin 1 were synthesized. The electrochemical behavior of these com-pounds was studied using cyclic voltammetry (CV) and rotating disk electrode (RDE) techniques. The antioxidant activity of complexes was estimated by means of the electrochemical assay based on the hydrogen atom transfer reaction to the stable radical 2,2’-diphenyl-1-picrylhydrazyl (DPPH). The RDE method was applied for this process monitoring. It was shown that the efficiency of the metal complexes (Cu2+,Co2+,Mn2+,Ni2+,Fe3+) is practically the same order as that of free base porphyrin 1. However the Zn2+ complex demonstrates significantly higher antioxidant activity, and the stoichiometry of the reaction was determined as σ = 4. The results demonstrate that porphyrin macrocycle can directly affect the antioxidant properties of 2,6-diisobornylphenol.