Department of Environmental Science and Engineering, Fuzhou University, Minhou, Fujian 350108, PR China.
Department of Environmental Science and Engineering, Fuzhou University, Minhou, Fujian 350108, PR China.
Spectrochim Acta A Mol Biomol Spectrosc. 2024 Dec 15;323:124915. doi: 10.1016/j.saa.2024.124915. Epub 2024 Jul 30.
The development of innovative multi-emission sensors for the rapid and accurate detection of contaminants is both vital and challenging. In this study, utilizing two rigid ligands (HICA and HBTEC), a series of water-stable bimetallic organic frameworks (EuTb-MOFs) were synthesized. Luminescent investigations have revealed that EuTb-MOF-1 exhibits prominent multiple emission peaks, attributed to the distinctive fluorescence characteristics of Eu(III) and Tb(III) ions. Therefore, EuTb-MOF-1 efficiently recognized various metal ions and pharmaceutical compounds through 2D decoded maps. Fe and Pb exhibited significant quenching effects on the luminescence of EuTb-MOF-1, which were attributed to the internal filtering effect and the interaction between Lewis basic sites within EuTb-MOF-1 and Pb ions, respectively. Furthermore, EuTb-MOF-1 demonstrated high sensitivity to sulfonamide antibiotics, with detection limits of 0.037 μM for SMZ and 0.041 μM for SDZ, respectively. In addition, EuTb-MOF-1 was immobilized to prepare MOF-based test strips, enabling direct visual detection of sulfonamides as a portable sensor. With excellent water stability, multi-responsive recognition capabilities, and high sensitivity to specific analytes, EuTb-MOF-1 is a promising candidate for environmental contaminant detection in aquatic systems.
开发用于快速准确检测污染物的创新多发射传感器既至关重要又极具挑战性。在这项研究中，利用两种刚性配体（HICA 和 HBTEC），合成了一系列水稳定的双金属有机骨架（EuTb-MOFs）。发光研究表明，EuTb-MOF-1 表现出突出的多发射峰，归因于 Eu(III)和 Tb(III)离子的独特荧光特性。因此，EuTb-MOF-1 通过 2D 解码图谱有效地识别各种金属离子和药物化合物。Fe 和 Pb 对 EuTb-MOF-1 的发光表现出显著的猝灭效应，这归因于内部过滤效应和 EuTb-MOF-1 内路易斯碱性位点与 Pb 离子之间的相互作用。此外，EuTb-MOF-1 对磺胺类抗生素表现出高灵敏度，对 SMZ 的检测限为 0.037 μM，对 SDZ 的检测限为 0.041 μM。此外，EuTb-MOF-1 被固定化以制备基于 MOF 的测试条，作为一种便携式传感器可以直接目视检测磺胺类药物。EuTb-MOF-1 具有出色的水稳定性、多响应识别能力和对特定分析物的高灵敏度，是用于检测水生系统中环境污染物的有前途的候选物。
