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 (H₂S), the creation of rapid, highly selective and sensitive probes for the detection of H₂S 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 H₂S. H₂S-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 H₂S was studied by UV-vis, ¹H NMR, mass and HPLC analysis. In addition, the chemosensor has been used for the determination of H₂S in many real-time samples.

中文翻译：

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一种用于检测硫化氢的高选择性和高灵敏度比色化学传感器：在多个平台中的实时应用

由于其简单性和良好的响应特性，量热化学传感器被发现是有利的传感系统。尽管已经报道了一些比色探针可以检测硫化氢 (H _{2 S)，但创建用于检测 H 2} S的快速、高选择性和灵敏的探针仍然是一个具有挑战性的目标。在这项工作中，我们建立了二硝基磺酰胺修饰的菲啶和 2,4-二硝基-N-(4-(7,8,13,14-四氢二苯并[a,i]菲啶-5-基)苯基)苯磺酰胺 ( PHSH )，用于H ₂ S的量热检测。H ₂ S 引发的 PHSH硫解导致显着的吸收增强以及从无色到深黄色的视觉颜色变化。结果表明，该化学传感器具有较高的灵敏度和选择性，响应时间小于10 s，检测限低至6.5 nM。通过UV-vis、¹ H NMR、质谱和HPLC分析研究了化学传感器与H _{2 S的反应机理。}此外，化学传感器已用于许多实时样品中 H _{2 S 的测定。}