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首页> 外文期刊>American Journal of Analytical Chemistry >The Application of Novel Electrochemical Approach to Antioxidant Activity Assay of Metal Porphyrins with Bulky 3,5-Diisobornyl-4-hydroxyphenyl Moieties
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The Application of Novel Electrochemical Approach to Antioxidant Activity Assay of Metal Porphyrins with Bulky 3,5-Diisobornyl-4-hydroxyphenyl Moieties

机译：新型电化学方法在大体积3,5-二异冰片基-4-羟苯基部分金属卟啉抗氧化活性测定中的应用

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摘要

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.
机译：合成了基于介孔四（3,5-二异硼烷基-4-羟基苯基）卟啉1的生物金属（Zn2 +，Cu2 +，Co2 +，Mn3 +，Fe3 +）的配合物。使用循环伏安法（CV）和旋转盘电极（RDE）技术研究了这些化合物的电化学行为。通过基于与稳定的自由基2,2'-二苯基-1-吡啶并肼基（DPPH）的氢原子转移反应的电化学分析方法，评估了配合物的抗氧化活性。 RDE方法已应用于此过程监控。结果表明，金属络合物（Cu2 +，Co2 +，Mn2 +，Ni2 +，Fe3 +）的效率与游离碱卟啉1的效率几乎相同。但是，Zn2 +络合物显示出明显更高的抗氧化活性，并且反应的化学计量确定为σ=4。结果表明，卟啉大环化合物可直接影响2,6-二异冰片基苯酚的抗氧化性能。

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