A novel dual-emissive Eu³⁺-loaded metal–organic framework (MOF) is designed and successfully fabricated by introducing 2-hydroxyterephthalic acid (H₂BDC-OH) and Eu³⁺ ions into an UiO-66-type MOF material. The obtained MOF, here referred to as EuUCH, exhibits dual emission at 450 and 614 nm, and both emissions are quite stable in aqueous media in the pH range of 4–11. EuUCH is characterized by a high selectivity and sensitivity toward Fe³⁺ and Al³⁺, which yield different responsive modes. The two emissions of EuUCH are quenched by Fe³⁺; by contrast, only the emission at 450 nm is quenched by Al³⁺ showing a ratiometric fluorescence signal. More importantly, as there is no clear interference between the signals of Fe³⁺ and Al³⁺, EuUCH is successfully utilized for the simultaneous detection of Fe³⁺ and Al³⁺ in their mixtures. In addition, the simultaneous quantification of Fe³⁺ and Al³⁺ is achieved in more complicated swine wastewater with good recoveries. This work provides a water-stable dual-emissive probe and the possibility to achieve the simultaneous quantification of Fe³⁺ and Al³⁺ in complicated environment wastewater.

通过将 2-羟基对苯二甲酸 (H ₂ BDC-OH) 和 Eu ³⁺离子引入 UiO-66 型 MOF 材料，设计并成功制造了一种新型双发射 Eu ^{3+负载金属有机骨架 (MOF)。}获得的 MOF，这里称为EuUCH，在 450 和 614 nm 处表现出双重发射，并且两种发射在 4-11 的 pH 范围内的水性介质中都非常稳定。EuUCH的特点是对Fe ³⁺和Al ³⁺具有高选择性和敏感性，产生不同的响应模式。EuUCH的两次发射被Fe ³⁺淬灭；相比之下，只有 450 nm 的发射被 Al 淬灭³⁺显示比例荧光信号。^{更重要的是，由于Fe 3+}和Al ³⁺的信号之间没有明显的干扰，EuUCH成功地用于同时检测Fe ³⁺和Al ³⁺的混合物。此外，在更复杂的猪废水中实现了Fe ³⁺和 Al ^{3+的同时定量，并具有良好的回收率。}这项工作提供了一种水稳定的双发射探针，并为实现复杂环境废水中Fe ³⁺和Al ^{3+的同时定量提供了可能。}