Conductive polymers are characterized by a backbone of alternating single and double bonds, which have shown tremendous electrical, optical, and magnetic properties of metals while maintaining good processability. Among the conductive polymers, polyaniline (PANI) has been widely used due to its ease of preparation and excellent electrical conductivity. However, the emeraldine and pernigraniline salt forms of PANI share some common drawbacks with other organic electronic materials, such as (1) poor solubility in common organic solvents (2) low electrochemical stability of molecular constitutions, which lead to limited processability and insufficiently characterization of the polymer. Herein we present the synthesis and characterization of PANI-derivatives based on phenoxazine and carbazole cores. The polymers were stable and processable.  Spectroelectrochemical cyclic voltammetry characterizations of the polymers show high redox stability between the emeraldine and pernigraniline salt forms with remarkable cyclability. The morphologies of the polymer films were studied using (AFM), SEM and TEM. The films were investigated for their conductivity in different dopants and solvent as well as the performance as supercapacitors. Finally, we have studied the polymers' magnetism using Electron Paramagnetic Resonance (EPR) with various dopants.

Polyaniline based on phenoxazine and carbazole derivatives with improved electrochemical stability and processability

ACS Fall 2021

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