Bhosale Mayura U, Gujja Chaturvedi S, Asiwal Ekta P, Manjare Sudesh T, Pawar Suresh D
Department of Chemistry, University of Mumbai, Mumbai, 400098, India.
J Fluoresc. 2024 Jul 19. doi: 10.1007/s10895-024-03848-w.
Particle extraction via the liquid-liquid interface (PELLI) method has been utilized to produce Di-(2-ethylhexyl) phosphate (DEHP) coated MnO fluorescent nanoprobe denoted as MnO@DEHP for the selective detection of Fe ions. The synthesized MnO@DEHP nanoprobe was characterized by various instrumental techniques such as FT-IR, PXRD, TEM, EDAX, HRTEM, DLS, and XPS. Since the high concentration of Fe in waste water leads to water pollution, which in turn affects the ecosystem, and causes severe health hazards. Therefore, accurate detection of Fe ions in the aqueous systems is essential as they are involved in various chemical and biological processes in living things. Here, the synthesized MnO@DEHP nanoprobe selectively detects Fe ions in the presence of various metal ions in an aqueous media by fluorescence quenching (turn-off) mechanism. The limit of detection (LOD) of MnO@DEHP nanoprobe for Fe was found to be 0.49 µM. The test-strip method and real water sample analysis were also used to demonstrate the viability of MnO@DEHP as a fluorescent nanoprobe to detect Fe ions visually and in environment monitoring applications.
通过液 - 液界面颗粒萃取（PELLI）方法制备了磷酸二（2 - 乙基己基）酯（DEHP）包覆的MnO荧光纳米探针，记为MnO@DEHP，用于选择性检测铁离子。合成的MnO@DEHP纳米探针通过傅里叶变换红外光谱（FT - IR）、粉末X射线衍射（PXRD）、透射电子显微镜（TEM）、能量色散X射线光谱（EDAX）、高分辨率透射电子显微镜（HRTEM）、动态光散射（DLS）和X射线光电子能谱（XPS）等多种仪器技术进行表征。由于废水中高浓度的铁会导致水污染，进而影响生态系统，并造成严重的健康危害。因此，准确检测水系统中的铁离子至关重要，因为它们参与生物体内的各种化学和生物过程。在此，合成的MnO@DEHP纳米探针通过荧光猝灭（关闭）机制在水性介质中各种金属离子存在的情况下选择性地检测铁离子。发现MnO@DEHP纳米探针对铁的检测限（LOD）为0.49 μM。还使用试纸法和实际水样分析来证明MnO@DEHP作为荧光纳米探针在视觉检测铁离子和环境监测应用中的可行性。
