Ion-Pairing Assemblies Comprising Anion Complexes of π‑Extended Anion-Responsive Molecules

Anion-responsive molecules comprising
phenanthropyrrole rings were
synthesized by oxidative coupling. Spectroscopic and theoretical examinations
revealed the effects of the π-extended structures. In the solid
state as ion-pairing assemblies, Cl– complexes of
π-extended derivatives formed stacked structures composed of
Cl– complexes themselves and those formed with countercations
using extended π-moieties. Aliphatic anion-responsive molecules
and their Cl– complexes, as ion pairs with the triazatriangulenium
cation, provided hexagonal columnar structures with liquid-crystalline
mesophases.