Herein, a novel ionic fluorescent probe for mercury(II) detection is presented consisting of a functional quinoline-based IL. Interestingly, the probe displayed high sensitivity (0.8 nM) and selectivity through the regulation function of electrostatic attraction, where its performance was significantly superior to that of quinoline probes without negative charge. Furthermore, the probe was found to exhibit two different fluorescent signals and colorimetric signals in the presence of different concentrations of mercury(II), which was consistent with the reaction mechanisms of the generation of large conjugated systems and the formation of anion-mercury(II) complexes. Moreover, this probe could be further loaded on a simple filter paper to serve as a visual paper sensor due to its adequate response time of less than 5 s. This regulation function strategy of electrostatic attraction has excellent potential for use in the precise detection of targeted analytes in real complex samples with improved accuracy and selectivity.

在此，提出了一种用于汞 (II) 检测的新型离子荧光探针，该探针由功能性喹啉基 IL 组成。有趣的是，该探针通过静电吸引的调节功能表现出高灵敏度（0.8 nM）和选择性，其性能明显优于不带负电荷的喹啉探针。此外，发现该探针在不同浓度的汞（II）存在下表现出两种不同的荧光信号和比色信号，这与大共轭体系的产生和阴离子-汞（II）的形成的反应机制一致。 ）配合物。此外，由于其足够的响应时间小于 5 秒，该探针可以进一步加载到简单的滤纸上以用作视觉纸传感器。