A new 'turn-on' naphthalenedimide-based chemosensor for mercury ions with high selectivity: Successful utilization of the mechanism of twisted intramolecular charge transfer, near-ir fluorescence, and cell images

摘要

For the first time, a new near-IR "turn-on" fluorescent chemosensor with high selectivity for Hg ~(2+) ions was designed according to the twisted intramolecular charge transfer (TICT) mechanism. The selective fluorescence enhancement effect can be optimized by modulating the solvent systems. And this naphthalenedimide-based sensor with long wavelength absorption and emission can be used to image intracellular Hg ~(2+) ions in living Hela cells.