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制备了Eu(Ⅲ)配合物纳米颗粒并对其进行表面修饰以用于Cu(I)离子的检测。所采用的探测机制是源于Cu(I)离子催化的末端炔基和叠氮基团之间的1,3极性环加成。通过该反应,在Eu3+配合物纳米颗粒(给体)和一种荧光染料分子(受体)之间建立了共振能量传递关系。因为点击反应的速度正比于Cu(I)离子的浓度,因此通过监测染料分子荧光强度的变化即可检测出Cu(I)离子的浓度。基于共振能量传递机制和点击反应的敏感性,浓度为微摩尔量级的Cu(I)离子可以被探测到。
Eu (Ⅲ) complex nanoparticles were prepared and surface modified for the detection of Cu (I) ions. The detection mechanism employed was due to the 1,3-polar cycloaddition between Cu (I) ion-catalyzed terminal alkynyl groups and azide groups. Through this reaction, a resonant energy transfer relationship is established between the Eu3 + complex nanoparticle (donor) and a fluorescent dye molecule (acceptor). Because the click reaction rate is proportional to the Cu (I) ion concentration, the concentration of Cu (I) ions can be detected by monitoring the change in fluorescence intensity of the dye molecules. Based on the resonance energy transfer mechanism and the sensitivity of the click reaction, Cu (I) ions in micromolar concentrations can be detected.