Fluorescence “Turn-off” Sensing of Iron (III) Ions Utilizing Pyrazoline Based Sensor: Experimental and Computational Study
作者:Promila Sharma、Shikha Bhogal、Irshad Mohiuddin、Mohamad Yusuf、Ashok Kumar Malik
DOI:10.1007/s10895-022-03024-y
日期:2022.11
utilized for the detection of Fe3+ ions. Fluorescence emission selectively quenched by Fe3+ ions compared to other metal ions (Mn2+, Al3+, Fe2+, Hg2+, Cu2+, Co2+, Ni2+, Cd2+, Pb2+, and Zn2+) via paramagnetic fluorescence quenching and showed good anti-interference ability over the existence of other tested metals. Under optimum conditions, the fluorescence intensity of sensor quenched by Fe3+ in the
一种简单的基于吡唑啉的“关闭”荧光传感器 5-(4-methoxyphenyl)-3-(5-methylfuran-2-yl)-1-phenyl-4,5-dihydro-1 H - pyrazole (PFM)通过不同的技术,如 FT-IR、1 H-NMR、13 C-NMR 和质谱法,合成和很好地表征。合成的传感器PFM用于检测Fe 3+离子。与其他金属离子(Mn 2+、Al 3+、Fe 2+、Hg 2+、Cu 2+、Co 2+、Ni 2+、Cd 2+、Pb 2+相比,Fe 3+离子选择性猝灭的荧光发射, 和锌2+ ) 通过顺磁荧光猝灭, 表现出优于其他被测金属存在的抗干扰能力。在最佳条件下,被Fe 3+猝灭的传感器的荧光强度在0~3 μM范围内,检测限为0.12 μM。通过荧光滴定法研究了Fe 3+离子与PFM溶液的结合,揭示了1:1 PFM-Fe金属络合物的形成,发现络合物的结合常数为1