Ghosh Priyotosh, De Diptiman, Sahoo Prithidipa
Department of Chemistry, Visva-Bharati University Santiniketan-731235 India
RSC Adv. 2024 Aug 12;14(34):25071-25076. doi: 10.1039/d4ra04339a. eCollection 2024 Aug 5.
Hydrogen sulfide is a highly toxic gas that can produce extremely rapid CNS and respiratory depression and sometimes becomes fatal at high concentrations. There is no proven antidote for hydrogen sulfide poisoning. Hence, it is important to reduce the production of HS in several industries, such as oil and gas refining and mining industries. As a consequence, researchers are always inquisitive about inventing different sensing devices or useful tools to detect HS selectively in a cost-effective manner. Colorimetric and fluorometric detection methods are the most attractive owing to their simplicity, profitability, ease of understanding, and "on-spot" detection convenience. In this research, we developed some colorimetric and fluorometric chemosensors and established an assay for the easy detection of HS following a specific mechanism. The sensing mechanisms were well established through exhaustive spectroscopic studies and theoretical calculations. We first synthesized a series of chemosensors using 2-hydroxy naphthaldehyde as a primary fluorophore. The chemosensors were developed by incorporating various electron-releasing and donating groups while keeping the binding site unchanged. Subsequently, we compared their efficiency and binding ability towards HS with a possible mechanism. The chemosensor was employed through a paper strip for demonstration as an "in-field" device by changing the naked-eye and fluorescence color both in liquid and gas phases.
硫化氢是一种剧毒气体，可导致中枢神经系统和呼吸极其迅速地抑制，高浓度时有时会致命。目前尚无经证实的硫化氢中毒解毒剂。因此，在石油和天然气精炼以及采矿业等多个行业中减少硫化氢的产生非常重要。因此，研究人员一直热衷于发明不同的传感装置或有用工具，以经济高效的方式选择性地检测硫化氢。比色法和荧光检测法因其简单、成本效益高、易于理解以及“现场”检测方便而最具吸引力。在本研究中，我们开发了一些比色和荧光化学传感器，并建立了一种基于特定机制轻松检测硫化氢的分析方法。通过详尽的光谱研究和理论计算，传感机制得以充分确立。我们首先以2-羟基萘甲醛作为主要荧光团合成了一系列化学传感器。在保持结合位点不变的同时，通过引入各种供电子和吸电子基团来开发化学传感器。随后，我们比较了它们对硫化氢的效率和结合能力以及可能的机制。通过纸条使用化学传感器作为“现场”设备进行演示，在液相和气相中均改变肉眼和荧光颜色。
