3,3- and 4,4-dimethoxy-2,2-bipyrroles and aminopyrroles with high level electrons. Syntheses and properties of new poly-(2,2-bipyrroles)

摘要

In the present work was shown short efficient pathways toward alkoxypyrroles, alkoxybipyrroles and aminopyrroles. Starting from alkoxypyrrole derivatives new 3,3�- and 4,4�-dialkoxy-2,2�-bipyrroles were obtained. Obtained alkoxybipyrroles are active in electrochemical experiments and show rush polymerisation at potential sweeping. Characteristic curves for polymethoxy- and polybutoxypyrroles proving the formation of conducting polypyrrole films. Mentioned polymers possessing conductivity and electrodes modified with such films displayed sensitivity to the oxygen, HCl and different pH values in aqueous media. Furthermore, for the polybutoxypyrrole was observed an electrochromic effect.In this work was shown that not every high electronrich pyrrole monomer leads to anodic polymerisation. Amino pyrroles can be only irreversible oxidized on anode without any polymer deposition. However, oxidation potentials shown by these pyrroles are the lowest from the set of compounds investigated in this work.All obtained substances were characterized and identified with analytical and spectroscopic methods.