Excited‐State Intramolecular Proton Transfer (ESIPT) for Optical Sensing in Solid State (Advanced Optical Materials 23/2021)

In their Review (article number 2001952), Ling Chen, Peng-Yan Fu, Mei Pan and co-workers give a summary introduction of ESIPT (excited state intramolecular proton transfer) materials in the solid including small organic molecules, metal-organic frameworks covalent-organic frameworks. The four-leveled energy cycle based keto-enol emissions these respond to temperature, pressure, solvent, ions, light so on, can be applied widely optical sensing fields.