The electrochemical behaviour of metalloporhyrins with 2,6-di-tert-butylphenol

Electrochemical method for the evaluation of antioxidative activity of compounds based on their reaction with the stable radical, 2,2 diphenyl 1 picrylhydrazyl, was suggested with moni toring of the reaction by cyclic voltammetry (CVA). Antioxidative properties of new ferrocene derivatives Fc(L)R (where Fc is the ferrocenyl, R is the fragment of 2,6 di tert butylphenol or its aromatic analog, L is the spacer) were studied. Anodic oxidation of the compounds Fc(L)R, which contain azomethine and 2,6 di tert butylphenol moities, proceeds in three steps, that suggests a possibility of intramolecular proton coupled electron transfer process. Conjugates of ferrocene and 2,6 di tert butylphenol are efficient antioxidants.