Abstract:

A novel tetraphenylethylene derivative (TPE-H) was designed and synthesized, which exhibited bright red aggregation induced emission (AIE) characteristics in THF/H₂O (0.5/9.5, volume ratio) solution medium. TPE-H selectively identified Pd²⁺ through a fluorescence "on-off" strategy. This sensor had excellent selectivity and sensitivity, and exhibited excellent stability over a wide pH range (4—10). Detailed research on Pd²⁺ detection showed that the detection limit for Pd²⁺ was 9.81×10^-8mol/L. The sensing mechanism was confirmed through ¹H NMR, Fourier transform infrared spectroscopy spectroscopy and mass spectroscopy. In the sensing test paper and real water sample testing, TPE-H had good sensing effect on Pd²⁺ with small errors. This study not only reported an effective Pd²⁺ fluorescence sensor, but also proposed good application prospects for in-situ and real-time sensing of Pd²⁺ in complex environments.

Key words: tetraphenylethylene, aggregation-induced luminescence, ion detection, palladium ion, fluorescent sensors

摘要：

设计并合成了一种新型四苯乙烯衍生物（TPE-H），该衍生物在THF/H₂O（0.5/9.5，体积比）溶液介质中显示出明亮的红色聚集诱导发射（AIE）特性。TPE-H通过荧光“开-关”策略选择性地鉴别Pd²⁺。该传感器具有出色的选择性和灵敏度，并在很宽的pH范围（4~10）内显示出出色的稳定性。对Pd²⁺检测的详细研究表明，Pd²⁺的检出限为9.81×10^-8mol/L。通过核磁共振氢谱、傅里叶红外光谱和质谱等测试确认了传感机理。在传感试纸和真实水样测试中，TPE-H对Pd²⁺具有良好的传感效果，误差较小。该研究不仅报道了一种有效的Pd²⁺荧光传感器，而且为在复杂环境中原位和实时传感Pd²⁺提出良好的应用前景。

关键词: 四苯乙烯, 聚集诱导发光, 离子检测, 钯离子, 荧光传感器