Opt Lett. 2023 Feb 15;48(4):944-947. doi: 10.1364/OL.479298.
Fluorescence sensors for trivalent europium ions (Eu) are seldom reported. We study the synthesis of water-soluble quaternary quantum dots (QDs) and investigate their fluorescence sensor application for detecting Eu The as-synthesized glutathione (GSH)-capped AgZnInS (AZIS) QDs show great sensitivity and selectivity to Euamong 12 different metal cations. Detailed experimental results indicate that the fluorescence response of the AZIS QDs to increasing concentration of Eu ([Eu]) include intensity quenching and peak wavelength blueshift. With the addition of OH-, the fluorescence response reverses. Electron transfer is considered to be the mechanism for the fluorescence quenching and peak wavelength blueshift of the GSH-capped AZIS QDs. Our work provides a new, to the best of our knowledge, method for the detection of Eu.
用于三价铕离子(Eu)的荧光传感器很少有报道。我们研究了水溶性四元量子点(QD)的合成，并研究了它们在检测 Eu 方面的荧光传感器应用。所合成的谷胱甘肽(GSH)包覆的AgZnInS(AZIS)QD 对 12 种不同金属阳离子中的 Eu 表现出很大的灵敏度和选择性。详细的实验结果表明，AZIS QD 对 Eu([Eu])浓度增加的荧光响应包括强度猝灭和峰波长蓝移。随着 OH-的加入，荧光响应发生反转。电子转移被认为是 GSH 包覆的 AZIS QD 荧光猝灭和峰波长蓝移的机制。据我们所知，我们的工作为 Eu 的检测提供了一种新的方法。
