Synthesis of imine polymers containing carbazole and pyrrole units and investigation of some properties

In this study, pyrrole-carbazole-pyrrole monomers coupled imine bond were synthesized in four steps. These monomers were polymerized by both chemically oxidative in the presence of FeCl3 and electrochemically oxidative process. While UV?Vis, FT-IR, 1H- and 13C NMR techniques were used for the structural characterization, the number-average molecular weight (Mn), weight-average molecular weight (Mw) and polydispersity index (PDI) values were determined by size exclusion chromatography (SEC). Thermal stabilities of these polymers were determined via thermogravimetric analysis (TGA). The highest occupied molecular orbital (HOMO), the lowest unoccupied molecular orbital (LUMO) energy levels, electrochemical (Eg?) and optical (Eg) band gap values were calculated by using the results of cyclic voltammetry (CV) and UV?Vis absorption spectroscopy measurements, respectively. Spectroelectrochemical measurements were carried out against the changes in the optical properties of conducting polymers upon voltage changed. Also the orange color of film changed to blue color with applied potential. Conductivity of these polymers were determined by using four point probe techniques. The conductivities were observed to be increased by iodine doping.