Preparation, crystal structure, and solid-state optical property of a disulfonic acid/amine fluorescent complex composed of 4,4′-biphenyldisulfonic acid and 2-naphthylethylamine

Solid-state disulfonic acid/amine fluorescent host complexes including methanol (MeOH) as guests were successfully prepared using 4,4′-biphenyldisulfonic acid and 2-naphthylethylamine as component molecules. Although the crystal structure of the obtained host complex is similar to that of the corresponding dicarboxylic acid/amine host complex, the solid-state photo-luminescence quantum yield of the disulfonic acid/amine fluorescent host complex is increased relative to those of the corresponding dicarboxylic acid/amine host complex.