“…1) were determined by cyclic voltammetry at a gold microelectrode in 1,2-DCE. In contrast to monomers with one pyrrole unit in the molecule [1,5], the oxidation potentials of the new monomers were lower enabling a weaker oxidant Fe 3+ to be used in the aqueous phase, compared with Ce 4+ [1,5]. The use of Fe 3+ is advantageous because the solution acidity need not be as high as with Ce 4+ .…”