College of Chemistry, Jilin University, Changchun, 130025, PR China.
College of Chemistry, Jilin University, Changchun, 130025, PR China.
Talanta. 2021 Jan 1;221:121434. doi: 10.1016/j.talanta.2020.121434. Epub 2020 Jul 24.
A new fluorescent sensor of tetraphenylethylene (TPE) derivate with four dimethylformamidine and four chloride anions, sensor 1, was resoundingly synthesized. Meanwhile, the structure of sensor 1 has been characterized by H NMR, C NMR, FT-IR and mass spectrum. Sensor 1 can dissolve in water completely and showed significant fluorescence enhancement response towards PO with selectivity and sensitivity in pure water. The results of fluorescence spectra, turbidity measurement, dynamic light scattering (DLS) and fluorescent micrographs elucidated that the distinct fluorescence enhancement of sensor 1 with PO anion can be attributed to the aggregation-induced emission (AIE) of TPE. The AIE of sensor 1 with PO anion was reversible, proved by the alternate addition of PO anion and calcium ion. The fluorescence intensity of sensor 1 at 510 nm gradually increased and was obviously augmented by 266% when the added concentration of PO was 150 μmol L (15 equiv. of sensor 1). In addition, the fluorescence intensity also displayed a good linear relationship with PO ions in the large concentration range of 10-150 μmol L with very low detection limit for PO of 6.56 × 10 mol L. Furthermore, sensor 1 also presented the semi-quantitative visual detection ability for PO in solutions and test paper mode via the fluorescence changes and quantitative detection potential for PO in actual water sample.
一种新型的四苯乙烯（TPE）衍生物荧光传感器，带有四个二甲氨基和四个氯离子，传感器 1 被成功合成。同时，通过核磁共振氢谱（1H NMR）、核磁共振碳谱（13C NMR）、傅里叶变换红外光谱（FT-IR）和质谱对传感器 1 的结构进行了表征。传感器 1 可以完全溶解在水中，并在纯水中对 PO 表现出显著的荧光增强响应，具有选择性和灵敏度。荧光光谱、浊度测量、动态光散射（DLS）和荧光显微镜的结果表明，传感器 1 与 PO 阴离子的显著荧光增强归因于聚集诱导发光（AIE）效应。传感器 1 与 PO 阴离子的 AIE 是可逆的，通过交替添加 PO 阴离子和钙离子得到了证明。当加入的 PO 浓度为 150μmol·L（传感器 1 的 15 当量）时，传感器 1 在 510nm 处的荧光强度逐渐增加，明显增强了 266%。此外，在 10-150μmol·L 的大浓度范围内，荧光强度与 PO 离子也呈现出良好的线性关系，PO 的检测限低至 6.56×10-7mol·L。此外，传感器 1 还在溶液和试纸模式下通过荧光变化呈现出对 PO 的半定量可视化检测能力，以及对实际水样中 PO 的定量检测潜力。
