Han Bo-Ming, Zhang Hao-Rui, Gao Wen-Jie, He Xi-Wen, Li Wen-You, Zhang Yu-Kui
State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Biosensing and Molecular Recognition, Research Center for Analytical Sciences, College of Chemistry, Nankai University, Tianjin, 300071, China.
National Chromatographic Research and Analysis Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.
J Fluoresc. 2025 Mar 18. doi: 10.1007/s10895-025-04234-w.
In this work, a dual-emission material based on lanthanide metals was synthesized and used as a ratio fluorescence sensor to respond to Hg and HO, respectively. Tb-BDC-NH as a bimetal MOFs had double ligands and exhibited double fluorescence emission peaks at 550 nm and 450 nm. The two emission peaks of Tb-BDC-NH can be quenched by Hg and HO respectively, forming a built-in calibration signal for ratio fluorescence detection. Based on the different detection conditions of the Hg and HO, the simultaneous detection of the two detection substances can be achieved with simple operation. This detection system had good stability and anti-interference ability. Under optimal conditions, the detection limit for Hg detection was 0.2 µM. Meanwhile, for the detection of HO, the detection limit was 11 µM and large linear ranges were obtained. Through actual sample testing, it had been proven that the ratio fluorescence sensor based on Tb-BDC-NH had good application prospects. And the work also provided a new idea for double substances detection.
在这项工作中，合成了一种基于镧系金属的双发射材料，并将其用作比率荧光传感器，分别用于检测汞和羟基自由基。Tb-BDC-NH作为一种双金属金属有机框架材料具有双配体，在550nm和450nm处呈现双荧光发射峰。Tb-BDC-NH的两个发射峰可分别被汞和羟基自由基猝灭，形成用于比率荧光检测的内置校准信号。基于汞和羟基自由基不同的检测条件，可通过简单操作实现对两种检测物质的同时检测。该检测系统具有良好的稳定性和抗干扰能力。在最佳条件下，汞检测的检出限为0.2μM。同时，对于羟基自由基的检测，检出限为11μM，并获得了较大的线性范围。通过实际样品测试，已证明基于Tb-BDC-NH的比率荧光传感器具有良好的应用前景。这项工作也为双物质检测提供了新思路。
