We designed and synthesized three new tetraphenylethene (TPE) derivatives (CZ-TPE, DMA-TPE and TPA-TPE) modified with different electron rich group (carbazole, N, N-dimethylaniline and triphenylamine segments, respectively) by Knoevenagel condensation reaction. The chemical structures of these compounds are identified by NMR, MS and IR. The absorption and emission of these dyes were investigated by UV-Vis and fluorescence spectroscopy, respectively. The results shown three dyes exhibited evident aggregation-induced emission (AIE) or aggregation-induced emission enhancement (AIEE) properties with wavelength tunable emission. Their emission color can be tuned from green to orange in tetrahydrofuran/H₂O solutions, from green to red in solid state or pure tetrahydrofuran solutions. In addition, the solution or film of TPA-TPE shown results in distinct fluorescence from “ON” to “Off” observation as well as color change from orange yellow to colorless by naked eyes when the addition of toxic Cl₂ gas, which can be used as an excellent dual chromo- and fluorogenic signal changes that is well suited for monitoring Cl₂ gas in solution, or solid film, conveniently. These results indicate TPA-TPE is a promising candidate chemosensor for the detection of Cl₂ gas.

我们设计并合成了三种新的四苯乙烯（TPE）衍生物（CZ-TPE，DMA-TPE和TPA-TPE），这些衍生物通过Knoevenagel缩合反应被不同的富电子基团（分别为咔唑，N，N-二甲基苯胺和三苯胺链段）改性。这些化合物的化学结构通过NMR，MS和IR鉴定。这些染料的吸收和发射分别通过紫外-可见光谱和荧光光谱研究。结果表明，三种染料在波长可调发射下均表现出明显的聚集诱导发射（AIE）或聚集诱导发射增强（AIEE）特性。在四氢呋喃/ H _2中可以将它们的发射颜色从绿色调整为橙色O溶液，从绿色到固态红色或纯四氢呋喃溶液。此外，所显示的TPA-TPE溶液或薄膜导致从“开”到“关”观察时产生明显的荧光，并且当添加有毒的Cl ₂气体时，肉眼看到的颜色从橙黄色变为无色，这可能是由于用作出色的发色和发荧光双重信号更改，非常适合于方便地监控溶液或固体膜中的Cl ₂气体。这些结果表明TPA-TPE是用于检测Cl ₂气体的有前途的候选化学传感器。