A new pyrene-phosphonate colorimetric receptor 1 has been designed and synthesized in a one-step process via amide bond formation between pyrene butyric acid chloride and phosphonate-appended aniline. The pyrene-phosphonate receptor 1 showed aggregation-induced enhanced emission (AIEE) properties in water/acetonitrile (ACN) solutions. Dynamic light scattering (DLS) characterization revealed that the aggregates of receptor 1 at 80% water fraction have an average size of ≈142 nm. Field emission scanning electron microscopy (FE-SEM) analysis confirmed the formation of spherical aggregates upon solvent evaporation. The sensing properties of receptor 1 were investigated by UV-vis, fluorescence emission spectroscopy, and other optical methods. Among the tested metal ions, receptor 1 is capable of recognizing the Fe3+ ion selectively. The changes in spectral measurements were explained on the basis of complex formation. The composition of receptor 1 and Fe3+ ions was determined by using Job’s plot and found to be 1:1. The receptor 1–Fe3+ complex showed a reversible UV-vis response in the presence of EDTA.
通过
芘丁酰氯与
膦酸盐添加
苯胺之间形成的酰胺键,一步法设计并合成了一种新的
芘-
膦酸盐比色受体 1。
芘-
膦酸盐受体 1 在
水/
乙腈(ACN)溶液中显示出聚集诱导增强发射(AIEE)特性。动态光散射(DLS)表征显示,
水含量为 80% 时受体 1 的聚集体平均尺寸≈142 nm。场发射扫描电子显微镜(FE-
SEM)分析证实了溶剂蒸发后形成的球形聚集体。受体 1 的传感特性通过紫外可见光、荧光发射光谱和其他光学方法进行了研究。在测试的
金属离子中,受体 1 能够选择性地识别 Fe3+ 离子。光谱测量结果的变化可以用络合物的形成来解释。利用约伯图确定了受体 1 和 Fe3+ 离子的组成,发现两者的比例为 1:1。受体 1-Fe3+ 复合物在
乙二胺四乙酸的存在下显示出可逆的紫外-可见响应。