基于Fe³⁺荧光传感器的制备与表征

Preparation and Characterization of Fluorescent Sensors Based on Fe³⁺

摘要: Fe³⁺作为人体必需的微量元素之一，在机体的生理病理过程中发挥着重要作用。然而，体内Fe³⁺的不平衡可能导致多种疾病。因此，在各种生物和环境系统中检测Fe³⁺是至关重要的。在镧系化合物中，稀土元素具有独特的4f轨道电子，当其共振能级接近有机物的三重态能级时，可以发生f → f或f → d跃迁，容易产生天线效应。因此，本文选择有机化合物作为天线敏化Tb³⁺的亮绿色发光，而Fe³⁺基于能量竞争吸收可有效淬灭Tb³⁺的特征发光。作为最有前途的化学传感器之一，荧光传感器可以作为材料分析的中介有效地检测Fe³⁺。

Abstract: As one of the essential trace elements, Fe³⁺ plays an important role in the physiological and pathological processes of the body. However, an imbalance of Fe³⁺ in the body may lead to a variety of diseases. Therefore, the detection of Fe³⁺ in a variety of biological and environmental systems is critical. In lanthanide compounds, rare earth elements have unique 4f orbital electrons, and when their resonant energy level is close to the triplet energy level of organic matter, f → f or f → d transition can occur, which is easy to produce an antenna effect. Therefore, in this paper, organic compounds are selected as the bright green luminescence of antenna-sensitized Tb³⁺, while Fe³⁺ can effectively quench Tb³⁺ characteristic luminescence based on energy competitive absorption. As one of the most promising chemical sensors, fluorescence sensors can effectively detect Fe³⁺ as an intermediary in material analysis.