Synthesis and application of a novel fluorescent probe for detection of hydrogen sulfide in real samples

ABSTRACT

A novel reactive fluorescent hydrogen sulphide (H₂S) probe (T-DNBS) consisting of 2,4-dinitrobenzenesulfonyl (DNBS) units has been synthesised from 4,7-dibromo-2,1,3-benzothidiazole. Adding H₂S to probe T-DNBS solution resulted in a marked fluorescence increase accompanied by a visual colour change from colourless to pale red. Probe T-DNBS performed excellent sensitivity and selectivity for H₂S, substantial fluorescence enhancement, can be detected quantitatively in the concentration range of 0–125 μM and the low detection limit was 77.78 nM. In addition, the probe T-DNBS can track H₂S in red wine samples with high accuracy, high recovery and practical value in food analysis.

KEYWORDS:

• Fluorescent probe
• hydrogen sulphide
• 2,4-dinitrobenzenesulfonyl
• synthesis
• reaction-based

Acknowledgments

The authors are grateful for financial support from the Fundamental Research Funds for the Central Universities, Key Laboratory of General Chemistry of the National Ethnic Affairs Commission, Southwest Minzu University (No. 2020PTJS20006).

Disclosure statement

No potential conflict of interest was reported by the author(s).

Supplementary material

Supplemental data for this article can be accessed online at https://doi.org/10.1080/03067319.2022.2118582

Additional information

Funding

This work was supported by the Key Laboratory of General Chemistry of the National Ethnic Affairs Commission, Southwest Minzu University. [2020PTJS20006].