AI Article Synopsis
- Calorimetric chemosensors are advantageous due to their simplicity and effective responsiveness, yet developing highly selective and sensitive probes for hydrogen sulfide (H₂S) remains challenging.
- This study introduces a new chemosensor, PHSH, which uses dinitrosulphonamide and phenanthridine to detect H₂S, resulting in a significant color change and increased absorption upon reaction.
- The PHSH chemosensor demonstrates rapid response times under 10 seconds, high sensitivity with a detection limit of 6.5 nM, and has been successfully applied to various real-time sample analyses.
Article Abstract
Calorimetric chemosensors are found to be advantageous sensing systems due to their simplicity and favorable responsive properties. Although some colorimetric probes have been reported to detect hydrogen sulfide (H S), the creation of rapid, highly selective and sensitive probes for the detection of H S remains a challenging target. In this work, we established dinitrosulphonamide decorated phenanthridine and 2,4-dinitro-N-(4-(7,8,13,14-tetrahydrodibenzo[a, i]phenanthridin-5-yl)phenyl)benzenesulfonamide (PHSH), for the calorimetric detection of H S. H S-triggered thiolysis of PHSH resulted in a marked absorption enhancement alongside a visual color change from colorless to dark yellow. The result indicated that the chemosensor showed high sensitivity and selectivity with a fast response of less than 10 s with a detection limit as low as 6.5 nM. The chemosensor reaction mechanism with H S was studied by UV-vis, H NMR, mass and HPLC analysis. In addition, the chemosensor has been used for the determination of H S in many real-time samples.
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