A near-infrared fluorescence chemodosimeter for fluoride via specific Si–O cleavage

A near-infrared (NIR) fluorescent chemodosimeter for F− was developed on the basis of dicyanomethylene-4H-chromene derivative, with several merits such as a high off/on ratio response, NIR fluorescence, and high selectivity to F−. The F− triggered specific Si–O cleavage of DCPOSi to release DCPO− is responsible for the dramatic color change and distinct NIR fluorescence enhancement at 718 nm.