Ratiometric Determination of Water Content in Acetonitrile by a Fluorescein Derivative Bearing Two Pyrene Subunits

摘要

Measuring and controlling water content in organic solvents are factors of considerable importance in many chemical and industrial processes. The Karl Fischer titration, based on a well-known water consuming reaction, has been the most widely used technique for the water content determination in many substances. However, optical systems offer greater convenience and ease to use for routine work. Recently, a variety of optical signaling systems for metal ions and anions, such as chromo-genic and fluorogenic sensors that convert chemical information or physical interactions into optically detectable signals have been developed as they are simple to manipulate and often allow naked-eye detection. There have been many reports on optical sensing systems employing dye molecules, including merocyanines, flavones, chalcone, 3-hydroxychrompne, naphthalimide, and indole derivatives for the determination of water content in organic solvents.