Organizational Characteristics of Some Ionene Oligomers Bearing the Viologen Mesogenic Moiety

Abstract

The synthesis and characterization of some ionene oligomers bearing the viologen moiety and separated by methylenic spacers of varying length is reported. The organization of these oligomers, which was the main subject of the characterization was studied by various methods including X-ray powder diffraction patterns, differential scanning calorimetry and electron microscopy. For these oligomers, both in the bulk and the solution a lamellar structure was proposed consisting of alternate polar layers, formed through the electrostatic interaction of quaternary nitrogens with bromides, and of the lipophilic layers of the methylenic spacers.