| A near infrared fluorescence probe XI-H2S for detecting hydrogen sulfide (H2S) was designed and synthesized in this paper. The probe XI-H2S is composed of a near-infrared fluorophore XI-OH with oxanthracene as the skeleton and a response group of 2, 4-dinitrobenzene sulfonyl in response to H2S. Due to the strong electron absorption effect of 2, 4-dinitrobenzene sulfonyl group, the ICT process of the probe will be interrupted. H2S can thiolize benzene sulfonyl group, restore the ICT process of the probe, produce obvious near-infrared fluorescence signal, and realize the change of fluorescence from zero to zero. Fluorescent probe XI-H2S has the advantages of long emission wavelength (716 nm), good selectivity, fast response speed, strong anti-interference, low detection limit (651 nM), etc. At the same time, the probe XI-H2S has been applied to the detection of H2S in different water samples. |
