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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...
A new ferrocene-based electrochemical chemodosimeter (1) for mercury(II) ion was prepared and characterized by X-ray crystal analysis. Among various metal ions, 1 displays highly selective electrochemical signaling changes for Hg 2+ over other metal ions in regard to a mercury-promoted intramolecular cyclic guanylation of thiourea.
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