期刊
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
卷 168, 期 5, 页码 -出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1945-7111/abfa5a
关键词
Sulfite detection; NIR ratiometric probe; Nucleophilic addition; Food samples; Cell imaging
资金
- National Natural Science Foundation of China [21978069, 21776061]
- State Key Laboratory of Fine Chemicals [KF1817]
- program for Science & Technology Innovation Team in Universities of Henan Province [19IRTSTHN029]
Sulfite (SO3 (2-)), as an important reactive sulfur in the food industry and various physiological processes, requires an effective detection method. Inspired by the effect of electron-donating or electron-withdrawing groups on fluorescence emission spectrum shift, this study designed and synthesized cyanine-based fluorescent probes BBHy and NBHy. NBHy, with large Stokes shift and fluorescence intensity change in the presence of SO3 (2-), showed superior recoveries for SO3 (2-) detection in food samples and living cells through dual-channel fluorescence imaging, confirming the feasibility of the probe design.
Sulfite (SO3 (2-)), as an SO2 derivative and important reactive sulfur, plays a vital role in the food industry and various physiological processes. So, it is urgent to seek out an effective method for SO3 (2-) detection. This work, inspired by the increase of electron-donating groups or electron-withdrawing groups in the molecular structure has a significant effect on the shift of fluorescence emission spectrum, and the nucleophilic addition reaction of SO3 (2-) to C=C double bond can make a noticeable change in fluorescence spectra. Two cyanine-based fluorescent probes BBHy and NBHy were reasonably designed and synthesized. Among them, near-infrared emitting NBHy with large Stokes shift (277 nm) and fluorescence intensity change in the presence of SO3 (2-) was selected, and then NBHy displayed superior recoveries for SO3 (2-) detection in food samples. Besides, NBHy was also successfully applied for SO3 (2-) sensing in living cells through dual-channel fluorescence imaging, which confidently confirmed the feasibility of our probe design.
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