Abstract In this work, a T-shape organic molecule 5-(pyridin-4-yl)isophthalic acid was synthesized via a Suzuki coupling reaction and used as the ligand for a serial of mixed-lanthanide complexes. The chemical compositions of the lanthanide complexes were determined as (EuxTb1−x)2L3(H2O)4 by elemental analysis (EA) and thermo gravimetric analysis (TGA). The luminescent properties of the as-synthesized complexes were investigated and the intramolecular energy transfer mechanisms involved, were discussed. Efficient energy transfer from Tb3+ to Eu3+ was observed and controlled by changing the molar ratio of Tb3+ to Eu3+ ions, allowing the color tuning on the luminescent emission of the mixed-lanthanide complexes.

中文翻译：

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5-(吡啶-4-基)间苯二甲酸可变色镧系配合物的合成及发光性能

摘要 在这项工作中，通过铃木偶联反应合成了一种 T 型有机分子 5-(吡啶-4-基)间苯二甲酸，并将其用作一系列混合镧系元素配合物的配体。通过元素分析 (EA) 和热重分析 (TGA) 确定镧系元素配合物的化学成分为 (EuxTb1-x)2L3(H2O)4。研究了合成的复合物的发光特性，并讨论了所涉及的分子内能量转移机制。通过改变 Tb3+ 与 Eu3+ 离子的摩尔比，观察和控制从 Tb3+ 到 Eu3+ 的有效能量转移，从而允许对混合镧系元素配合物的发光进行颜色调整。