Abstract
In view of the important physiological and pathological roles of hydrogen sulfide (H2S) in living systems, the development of a highly sensitive and selective fluorescent sensor for the detection of H2S is crucial. A novel fluorescent sensor has been synthesized in this paper, which utilises thiolysis of thiophene esters assisted by an ortho-aldehyde group as a sensing strategy to achieve highly specific detection of H2S. It was shown that the sensor has excellent sensing performance for H2S with 300-fold fluorescence enhancement, Stokes shift up to 170 nm, fast response time up to 5 min, high sensitivity (limit of detection, LOD = 55 nM) and good selectivity. The sensor has been successfully used for colourimetric and fluorescence detection of H2S in solution. Test papers prepared with the sensor can be used to detect H2S gas in spoiled eggs and milk. In addition, the sensor can image H2S in living cells and zebrafish.
Published Version
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