Polyesters with bicarbazyl groups in the main chain and model compounds: synthesis, electrochemical and electroluminescence properties

Polyesters with bicarbazyl groups in the main chain were synthesized by a two-steps polycondensation in bulk, from the bicarbazyldioyl chloride and ethylene glycol. Electrochemical and electroluminescence properties of polyesters were studied and compared with those of model compounds of the repetitive unit. Electrochemical studies showed that the materials are electroactive and allowed the determination of the optimal stability conditions. From the photo- and electroluminescence studies of both the polyesters and the model compounds, a classification of the performances of the corresponding diodes was established. The best results were obtained with bicarbazyl (blue-light).