Results and Discussions Preparation of Single CrystalsNORIA was synthesized by reported methods (Fig. 2a).23 Condensation of resorcinol with dialdehyde in acidic ethanol gave a complex mixture containing NORIA. The dissolution ofcrude products in hot DMF was followed by filtration toremove undissolved polymeric byproducts. The resultingNORIA-enriched DMF solution (Fig. S1 in ESI) was slightlydiluted by chloroform and used for crystallization.