Hydrogen sulfide detection using nucleophilic substitution-cyclization-based fluorescent probes
Related Experiment Video
Updated: Apr 16, 2026

A Sensitive Visual Method for the Detection of Hydrogen Sulfide Producing Bacteria
Published on: June 27, 2022
1Department of Chemistry, Washington State University, Pullman, Washington, USA.
Abstract:
While previously known as a toxic pollutant, hydrogen sulfide (H2S) has been recently classified as an important signaling molecule with potent cytoprotective actions. The study on H2S is a rapidly growing field in biomedical research. Nevertheless, the detection of H2S in biological samples is still a challenge. Fluorescent assays can be very useful in this field owing to their high sensitivity and convenience. Based on the dual nucleophilicity of hydrogen sulfide, a series of reaction-based fluorescence "turn-on" probes have been developed by our lab. In this chapter, we provide an overview of the reactivity/property of these probes and detailed protocols for the use of them in experiments.
Related Concept Videos
Preparation and Reactions of Sulfides
Labeling DNA Probes
Radioisotopes, fluorophores, or small molecule binding partners like biotin or digoxigenin, are the most widely used reporter tags for labeling DNA probes. These labels can be attached to the probe DNA molecule via...
Radical Substitution: Hydrogenolysis of Alkyl Halides with Tributyltin Hydride
The bonds formed in this reaction are stronger than the bonds broken, making it energetically favorable. The reaction follows a radical chain mechanism similar to radical halogenation...
Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene
Amines to Sulfonamides: The Hinsberg Test
Generally, a primary amine reacts with the Hinsberg reagent to produce an N-substituted benzenesulfonamide. The electron-withdrawing sulfonyl...
FISH - Fluorescent In-situ Hybridization

