Highly selective and rapidly responsive fluorescent probe for hydrogen sulfide detection in wine

Area of Science:

• Chemical Sensing
• Analytical Chemistry

Background:

• Hydrogen sulfide (H₂S) is a crucial signaling molecule with diverse biological roles.
• Accurate detection of H₂S is vital for various applications, including biological research and quality control.

Purpose of the Study:

• To design and synthesize a novel fluorescent probe for the selective detection of hydrogen sulfide (H₂S).
• To evaluate the probe's performance as a visual sensor and its applicability in real-world samples.

Main Methods:

• Synthesis of 6-(2, 4-dinitrophenoxy)-2-naphthonitrile (probe 1).
• Spectroscopic analysis (fluorescence and colorimetric) to assess probe response to H₂S.
• Application of the probe for H₂S determination in beer and red wine samples.

Main Results:

• Probe 1 exhibited a significant fluorescence turn-on response upon addition of H₂S.
• A distinct visual color change from colorless to light yellow was observed, confirming its utility as a visual sensor.
• The probe successfully quantified H₂S levels in complex matrices such as beer and red wine.

Conclusions:

• The developed fluorescent probe offers a sensitive and selective method for H₂S detection.
• Probe 1 serves as a valuable tool for both visual sensing and quantitative analysis of H₂S.
• Its successful application in beverages highlights its potential for practical, real-time monitoring.