Abstract
As an extension of our research on the chemistry of heterocyclic compounds of great effectiveness and biological importance, we focused our interest on phenazines. In this review article, we reviewed the synthesis of phenazines, either chemically or biologically and, also reported the different reactions of them and some of their biological importance, such as antimicrobial activity, anti-oomycete activity, genotoxicity and, cytotoxicity. Here, we also reported some other uses such as using them in the development of electrochemical sensors and biosensors and using them for dye-sensitized solar cells (DSSCs).