Electrochemical oxidation of hematoxylin - Part 1: Experimental and theoretical studies in an aqueous acidic medium

► Electrochemical oxidation of hematoxylin in aqueous acidic solutions. ► EE reaction mechanism. ► Designation of structures using ab initio quantum mechanical method at the B3LYP/6-311 + G∗∗ level of theory. ► Electrochemical oxidation of hematoxylin in the presence of p-toluenesulfinic acid. ► Electrochemical tautomerizaton.