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 ¹H NMR, ¹³C NMR, FT-IR and mass spectrum. Sensor 1 can dissolve in water completely and showed significant fluorescence enhancement response towards PO₄³⁻ 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 PO₄³⁻ anion can be attributed to the aggregation-induced emission (AIE) of TPE. The AIE of sensor 1 with PO₄³⁻ anion was reversible, proved by the alternate addition of PO₄³⁻ 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 PO₄³⁻ was 150 μmol L⁻¹ (15 equiv. of sensor 1). In addition, the fluorescence intensity also displayed a good linear relationship with PO₄³⁻ ions in the large concentration range of 10–150 μmol L⁻¹ with very low detection limit for PO₄³⁻ of 6.56 × 10⁻⁸ mol L⁻¹. Furthermore, sensor 1 also presented the semi-quantitative visual detection ability for PO₄³⁻ in solutions and test paper mode via the fluorescence changes and quantitative detection potential for PO₄³⁻ in actual water sample.

具有四个二甲基甲脒和四个氯阴离子，传感器四苯基（TPE）衍生物的新的荧光传感器1，被响亮地合成。同时，传感器1的结构已经通过¹ H NMR，¹³ C NMR，FT-IR和质谱表征。传感器1可以完全溶解在水中，并且在纯水中对PO ₄ ^3-具有显着的荧光增强响应，并且具有选择性和灵敏度。荧光光谱，浊度测量，动态光散射（DLS）和荧光显微照片的结果表明，PO ₄ ^3−可以显着增强传感器1的荧光。阴离子可归因于TPE的聚集诱导发射（AIE）。带有PO ₄ ^3-阴离子的传感器1的AIE是可逆的，这是通过交替添加PO ₄ ^3-阴离子和钙离子来证明的。 当PO ₄ ^3-的添加浓度为150μmolL ^-1（相当于传感器1的15当量）时，传感器1在510 nm处的荧光强度逐渐增加，并明显增加266％。此外，在10–150μmolL ^-1的较大浓度范围内，荧光强度还与PO ₄ ^3-离子表现出良好的线性关系，对PO _4的检测限非常低6.56×10 ^-8  mol L ^-1中的3－。此外，传感器1还通过实际水样中PO ₄ ^3-的荧光变化和定量检测电势，显示了溶液中PO ₄ ^3-的半定量视觉检测能力和试纸模式。