Preparation and study of poly(9-methylcarbazole) and poly(9ethylcarbazole) films by electrochemical oxidation of monomers and dimers
Résumé
In the present study, we succeed in depositing poly(9-methylcarbazole) and poly(9ethylcarbazole) films by electrochemical oxidation using dichloromethane as solvent. Poly(9methylcarbazole) films obtained from 9-methyl-9H-carbazole are green, thick but not very rough and have a needle-like structure very different from that of carbazole, which is porous and looks like a honeycomb; whereas poly(9-methylcarbazole) films obtained from 9,9'dimethyl-9H,9'H-3,3'-bicarbazole are rougher, more electroactive and have a structure mixing needles and nodules. Poly(9-ethylcarbazole) films can only be grown from 9-ethyl-9Hcarbazole and are generally less homogeneous and have a more nodular structure. Finally, poly(9-alkylcarbazole) with longer chains cannot be electrochemically formed, mostly due to solubility problems.