Solid-state chiral optical properties of axially chiral binaphthyl acid derivatives

It is important to first determine the solid-state chiral optical properties of basic fluorescence supramolecular building blocks that can form a network structure via intermolecular interactions. Although the circularly polarized luminescence (CPL) properties of (R)-1,1′-binaphthyl-2,2′-dicarboxylic acid with axial chirality could not be measured in either the solution or solid states, those of (R)-1,1′-binaphthyl-2,2′-diyl hydrogen phosphate with axial chirality were successfully measured in both states. The solid-state CPL originates from the intramolecular interaction of single molecule, rather than intermolecular interactions in the crystal.