Clock reaction behavior in the oxidation polymerization of aniline hydrochloride by the peroxydisulfuric acid in a strong magnetic field

Abstract

It was made quantitatively clear that the oxidative polymerization process of aniline by S₂O₈^2- ion in a highly concentrated hydrochloric acid aqueous solution was a clock reaction. It was strongly dependent on the concentration of S₂O₈^2- ion at the start time of the clock reaction. The rate-determining process of the reaction was a one-electron transfer process from C₆H₅NH₂ to S₂O₈^2- ion. A possibility was strongly indicated that the strong magnetic field impression effect for this electron-transfer process acted as an inhibitive effect. Moreover, it became clear that the strong magnetic field impression did not influence the formation process of polyanilin. Also, it was indicated that the formation of polyaniline was suppresed by the reaction of the aniline radical with the dissolved oxygen.