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报道了一种基于香豆素衍生物与铜离子的络合物(C1-Cu),可通过间接的方法检测硫离子。络合物C1-Cu的溶液中加入硫离子后,表现出明显的荧光增强响应,检测灵敏度高,检出限低达90 nmol/L;响应速度快,可实现硫离子的实时检测;荧光强度变化与硫离子浓度呈现良好的线性关系,能准确地定量分析硫离子浓度。上述络合物C1-Cu对硫离子的检测具有超高的选择性,即使在其他阴离子存在下也能高效地识别出硫离子;得益于香豆素良好的水溶性和生物相容性,上述络合物C1-Cu可实现生物细胞中硫离子的荧光成像。除荧光光谱响应之外,该体系对硫离子亦有紫外-可见光谱响应,无需借助任何仪器便可实现对硫离子方便、快捷的“裸眼”检测。
A complex based on a coumarin derivative with copper ions (Cl-Cu) was reported to detect sulfur ions by an indirect method. The results showed that the detection sensitivity was as low as 90 nmol / L when the sulfide ions were added to the solution of complex C1-Cu. The fast response speed could detect the sulfur ions in real time. The fluorescence intensity The change shows a good linear relationship with the concentration of sulfide ion, which can accurately quantitatively analyze the concentration of sulfide ion. The above-mentioned complex C1-Cu has extremely high selectivity for the detection of sulfide ions, and can identify sulfur ions efficiently even in the presence of other anions. Due to the good water solubility and biocompatibility of the coumarins, The above complex C1-Cu enables the fluorescence imaging of sulfide ions in biological cells. In addition to the fluorescence spectral response, the system also has UV-Vis spectral response to sulfur ions, making it easy and fast to detect “naked eye” sulfur ions without using any instrument.