Synthesis and electrochemical investigations of piperazines

Sodium4-benzyl piperazine-1-carbodithioate and sodium4-benzhydryl piperazine-l-carbodithioate were synthesized and characterized by FT-IR and multinuclear NMR (H-1, C-13) spectroscopy. The effects of scan rate, pH and concentration on the voltammetric response of the analytes were investigated for the evaluation of electrochemical and kinetic parameters of the electron transfer processes. Redox mechanisms of the compounds were proposed on the basis of results obtained from electrochemical investigations. Square wave voltammetry was used to determine the limits of detection and quantification. Moreover, various thermodynamic parameters of the electrode reactions were evaluated from the temperature responsive redox response of the synthesized piperazines. (C) 2016 Elsevier Ltd. All rights reserved.