MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China.
Dalton Trans. 2021 Nov 9;50(43):15679-15687. doi: 10.1039/d1dt02733f.
Ratiometric fluorescent probes based on coordination polymers (CPs) have been widely applied in optical applications. Therefore, it is very important to develop a dual-emitting gel material based on coordination polymers for specific recognition of molecules. Cu-atda (Hatda = 3,3'-(4-amino-1,2,4-triazol-3,5-diyl) dibenzoic acid) is synthesized with a porous structure and a large number of amino sites exposed on the surface, which can be regarded as a carrier for fluorescent molecules and well disperse in the SA hydrogel network. A dual-emission Eu functionalized CP hydrogel bead (9A/Cu-atda@Eu3+/SA, 9A = 9-anthraldehyde and SA = sodium alginate) is successfully prepared, which presents ratiometric fluorescence detection of flumequine with a low detection limit (48 nM) and high selectivity. Furthermore, it also displays an excellent fluorescence quenching effect on nitrofuran antibiotics, exhibiting a dual functional performance. In addition, the fluorescence response mechanisms of flumequine and nitrofuran antibiotics are discussed in depth. As a portable material, visualization 9A/Cu-atda@Eu3+/SA beads provide an extensive and convenient application prospect for real-time monitoring of antibiotics in the water environment.
基于配位聚合物（CPs）的比率荧光探针在光学应用中得到了广泛的应用。因此，开发一种基于配位聚合物的双发射凝胶材料用于特定分子的识别非常重要。Cu-atda（Hatda = 3,3'-(4-氨基-1,2,4-三唑-3,5-二基)二苯甲酸）具有多孔结构和表面暴露的大量氨基位点，可视为荧光分子的载体，并能很好地分散在 SA 水凝胶网络中。成功制备了双发射 Eu 功能化 CP 水凝胶珠（9A/Cu-atda@Eu3+/SA，9A = 9-蒽醛，SA = 海藻酸钠），对氟喹诺酮类药物进行了比率荧光检测，检测限低（48 nM），选择性高。此外，它对硝基呋喃类抗生素也表现出优异的荧光猝灭效应，具有双重功能性能。此外，深入探讨了氟喹诺酮类药物和硝基呋喃类抗生素的荧光响应机制。作为一种便携式材料，可视化 9A/Cu-atda@Eu3+/SA 珠为实时监测水环境中的抗生素提供了广泛而便捷的应用前景。
