Tohora Najmin, Ahamed Sabbir, Chourasia Jyoti, Darnal Upika, Pradhan Subekchha, Rai Shraddha, Lama Shubham, Das Sudhir Kumar
Department of Chemistry, North Bengal University, Raja Rammohunpur, Darjeeling, West Bengal, 734013, India.
Mikrochim Acta. 2025 Apr 15;192(5):300. doi: 10.1007/s00604-025-07153-6.
Designing advanced photofunctional materials within the core of ionic liquids (ILs) has stimulated considerable attention within the scientific communities due to their impactful significance and physicochemical properties such as ionic nature, low melting point, non-volatility, and tunability without hampering their inherent photofunctionality. Herein, we have synthesized a photoluminescent IL, HTIL from 8-hydroxy pyrene-1,3,6-trisulfonic acid trisodium salt [HPTS] and trihexyltetradecylphosphonium chloride ([TTP]Cl) by simple ionic exchange reaction. Water-dispersible IL-based low-dimensional materials referred to as nHTIL were developed by a reprecipitation technique and validated using various spectroscopic and microscopic analyses methods. We have successfully demonstrated that neat HTIL could be used as a solvent-free fluorescent ink and checked its superiority as a security writing tool. A ratiometric cyanish to bluish fluorometric change is observed upon the addition of diethylchlorophosphate (DCP), a sarin mimic in the solution having detection and quantification limits within the µM range. Also, a portable and super handy paper-based test kit experiment has been illustrated and performed verifying DCP detection in the solid phase. A vapor strip-based experiment by nHTIL was conducted to explore the vapor phase detection of DCP. This report presents an innovative way to develop DCP-sensitive IL-based low-dimensional materials exhibiting remarkable properties compared to traditional ones for forensic and environmental monitoring.
在离子液体（ILs）核心内设计先进的光功能材料因其具有重要意义以及诸如离子性质、低熔点、不挥发性和可调节性等物理化学性质，且不影响其固有的光功能，而在科学界引起了相当大的关注。在此，我们通过简单的离子交换反应，由8-羟基芘-1,3,6-三磺酸三钠盐[HPTS]和三己基十四烷基氯化鏻（[TTP]Cl）合成了一种光致发光离子液体HTIL。通过再沉淀技术开发了称为nHTIL的水分散性基于离子液体的低维材料，并使用各种光谱和显微镜分析方法进行了验证。我们成功证明了纯HTIL可用作无溶剂荧光墨水，并检验了其作为安全书写工具的优越性。在加入二乙基氯磷酸酯（DCP，一种沙林模拟物）后，在溶液中观察到从蓝绿色到蓝色的比率荧光变化，其检测和定量限在微摩尔范围内。此外，还展示并进行了一个便携式且超级方便的纸质测试试剂盒实验，以验证固相中的DCP检测。进行了基于nHTIL的蒸汽条实验，以探索DCP的气相检测。本报告提出了一种创新方法，用于开发对DCP敏感的基于离子液体的低维材料，与传统材料相比，这些材料在法医和环境监测方面具有显著特性。
