镧系元素
荧光
发光
离子
显色指数
材料科学
光化学
发光二极管
化学
光电子学
光学
有机化学
物理
作者
Rui Shi,Li Yu,Yurun Tian,Xuemin Wang,Ziyu Sun,Bin Qi,Fang Luo
标识
DOI:10.1016/j.matchemphys.2022.125806
摘要
Lanthanide-2,6-pyridinedicarboxylic acid complex (DPA-Lanthanide) is a simple complex, and its structure has been reported by many researchers. However, people often overlook the luminescence properties of DPA-Lanthanide because of its simple structure and 2,6-pyridinedicarboxylic acid (DPA) as a smaller ligand. In this work, we synthesized a series of DPA-Lanthanidex complexes (1-14) by a simple hydrothermal method, and studied their luminescence properties. We have found that DPA-Lanthanide complexes with either single rare earth ions or double rare earth ions have good fluorescence emission properties. Among them, by changing the ratio of Eu3+ to Tb3+ in the DPA-Lanthanide complex of double rare earth ions can tune the color of fluorescence emission. Fluorescence emission of diversified colors can be obtained. In particular, DPA-Dy (14) can achieve single-component white light emission under 296 nm excitation, and emit blue fluorescence under 375 nm excitation. Because DPA-Lanthanide complexes have strong fluorescence emission intensity, long life, good color rendering, and good heat resistance, they have achieved good results in applications such as fluorescent anti-counterfeiting and LEDs. Interestingly, we found that the fluorescence emission intensity of DPA-Lanthanide complexes is not only affected by pH, but this effect is reversible. Moreover, it is interesting that the color of the emition light of DPA-Eu + Tb (7) changes with the influence of pH. This opens up possibilities for pH sensing.
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