Investigation of electrochemical and spectroelectrochemical properties of some amino-substituted naphthoquinones (NQs)

•Synthesis of N-substituted-1,4-naphthoquinones.•Redox reactions of quinones are important in biological and material fields.•Biological mechanisms of action of quinones can be revealed by electrochemistry.•Molecular activities of quinones are generally based on electron transfer.•Electro- and in-situ spectroelectrochemistry studies of designed compounds.