Dipyrrolylpyrimidines synthesized by coupling reactions exhibited anion-binding abilities with the inversion of pyrrole rings. In the solid state, anion complexes of dipyrrolylpyrimidines formed charge-by-charge columnar structures in combination with counter cations.
Multiply aryl-substituted pyrrole-based anion-responsive π-electronic molecules were synthesized. The effects of the introduced aryl moieties on solution-state emissive behaviours were examined, depending on the solvent polarity and anion binding.