Charge-by-Charge Assemblies from π-Conjugated Acyclic Anion Receptors

Abstract

π-Conjugated acyclic oligopyrroles as anion receptors have been found to form "planar anions" by complexation with anion to give the alternatively stacking structures with combination of counter cations in the solid state. On the other hand, in contrast to the transition from supramolecular gels comprising anion receptors to solution state by the addition of anions as tetraalkylammonium salts, the combination of the appropriate receptors and planar cation salts of anions form the nanoscale fibrous structures derived from stable charge-by-charge structures.