The electrochemical impedance technique (EIS) and the cyclic voltammetric method (CV) were used to investigate the behavior of purpurin (P), anthrapurpurin (AP) and benzopurpurin (BP) in aqueous and in N,N- dimethylformamide (DMF) media. In the CV experiments, both the radical and the dianion of these substances were assumed to form of limited stability due to chemical protonation. In case of ... Read more