A naphthol-functionalized bis(salamo)-like chromogenic and fluorogenic probe for monitoring hydrogen sulfide and application in water samples
Wenting Guo, Lin Dou, Yuan‐Ji Yan, Ruoyu Li, Wen‐Kui Dong
Abstract
A naphthol-functionalized bis(salamo)-like chromogenic and fluorogenic probe (TBS) was designed and synthesized for efficient double-channel detection of hydrogen sulfide (H2S). The probe TBS was characterized through various spectroscopic techniques. From both visible light and 365 nm UV light, TBS could have naked-eye recognition of H2S with obvious color change. In comparison with some chemical probes, the probe TBS could selectively monitor H2S with detection limit as low as 0.71 μM, which could serve as a promising candidate for detecting H2S in real world sampling. Beyond that, the sensing mechanism toward H2S was fully validated by 1H NMR, mass spectra (ESI-MS) as well as UV titration. Density-functional theory and time-dependent density-functional theory calculations were also carried out to further explain the photophysical behavior of the probe TBS with H2S. Finally, the probe TBS could be utilized as sulfide-targeted probe in a practical sample.