Abstract
Excessive sulfite is harmful to human health. To monitor the sulfite level in food, living cells, and organisms, we herein present a high-performance near-infrared (NIR) fluorescent probe DCQN that exhibits chromogenic and NIR fluorescence turn-on response towards sulfite with a rapid response time of 4.5 s, unique specificity, a low detection limit of 24 nM, and a large Stokes shift. DCQN was used for the facile and accurate determination of the sulfite level in real food with high sensitivity and good recoveries (93–105%). In particular, the sulfite present in food samples can be in situ visually detected by DCQN in terms of chromogenic reaction along with fluorescence turn-on indicator. Moreover, DCQN was incorporated into agar hydrogel to serve as a convenient, cheap and portable device for the fast and visual on-site detection of sulfite in food. Furthermore, DCQN was used to achieve in situ tracking and imaging of sulfite in MCF-7 cells and zebrafish with a high contrast ratio and high sensitivity.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
