Abstract
In order to form the stimuli-responsive organized structures, we can use boron complexes of dipyrrolyldiketones as π-conjugated acyclic anion receptors, which bind anions with the inversion of pyrrole rings. By means of peripheral modification, receptors form various “charge-by-charge assemblies” by complexation with anions and combination with a variety of counter cations in the solid state and soft materials. Control of pyrrole rings’ distortions in the absence and presence of anions would induce chiral environment, resulting in stimuli-responsive chiroptical properties such as circularly polarized luminescence (CPL). An efficient strategy is introduction of chiral diol moieties and various substituents at boron and pyrrole β-positions, respectively. The combination of 3,3´-diphenyl-BINOL and β-dihydronaphthopyrrole has been found to be the most efficient for achieving anion-driven CPL enhancement.
