Supramolecular structural transformation of N,N′-bis(4-pyridylmethyl)-naphthalene diimide and fluorescence water sensing

The supramolecular organic structure exhibits reversible dehydration/rehydration in a single-crystal-to-single-crystal process, selective adsorption of CO₂over N₂as well as H₂and sorption selectivity for water and fluorescence sensing of water.