Turn-On Luminescence Sensing and Real-Time Detection of Traces of Water in Organic Solvents by a Flexible Metal-Organic Framework

The development of efficient sensors for the determination of the water content in organic solvents is highly desirable for a number of chemical industries. Presented herein is a Mg2+ metal–organic framework (MOF), which exhibits the remarkable capability to rapidly detect traces of water (0.05–5 % v/v) in various organic solvents through an unusual turn‐on luminescence sensing mechanism. The extraordinary sensitivity and fast response of this MOF for water, and its reusability make it one of the most powerful water sensors known. Testing the water: A Mg2+ metal–organic framework (MOF) is reported. It has the extraordinary capability to detect, in real time, trace water concentrations (0.05–5 %) in various organic solvents through an unusual turn‐on luminescence sensing mechanism. The sensitivity and fast response of this MOF for water, and its reusability, make it one of the most powerful water sensors known.