Abstract
In this study, dicyanoisophorone was used as NIR (near-infrared spectroscopy) emission fluorophore, and thiobenzoate as the recognition function motif to fabricate probe HgS. Through the Hg-S linker, the whole molecule’s fluorescence was quenched due to the strong photoinduced electron transfer effect (PET). However, the Hg-S linker could be cut off upon the Hg2+ being added to the probe solution, leading to a strong fluorescence emission turned on by the intramolecular charge transfer effect (ICT). The probe HgS can respond to Hg2+ during the NIR emission spectral range and exhibits a significant Stokes shift (215 nm), excellent selectivity, and biocompatibility. Besides, the probe HgS can be used to monitor Hg2+ in bio-system and water samples.
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This work was supported by grants from the National Natural Science Foundation of China (Grant Nos. 22106008).
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Yibin Zhang: conceptualization, investigation, funding acquisition. Qing Yana, Yueting Cheng, Boling Wang, Xiaoqian Rong, Yanhong Kuang, Xianyu Qiu, Lin Sun: investigation. Yanyan Zhou: methodology, writing–reviewing and editing.
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Yibin Zhang declares that he has no conflict of interest. Qing Yana declares that he has no conflict of interest. Yueting Cheng declares that he has no conflict of interest. Boling Wang declares that he has no conflict of interest. Xiaoqian Rong declares that he has no conflict of interest. Yanhong Kuang declares that he has no conflict of interest. Xianyu Qiu declares that he has no conflict of interest. Lin Sun declares that he has no conflict of interest. Yanyan Zhou declares that he has no conflict of interest.
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Zhang, Y., Yan, Q., Cheng, Y. et al. A Novel “Off–On” NIR Fluorescent Probe for Detecting Hg2+ Based on Dicyanoisophorone and Its Application in Bio-imaging and Real Water Samples. Food Anal. Methods 15, 3490–3497 (2022). https://doi.org/10.1007/s12161-022-02377-1
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DOI: https://doi.org/10.1007/s12161-022-02377-1