In this study, we report the luminescence color tuning in the lanthanide metal-organic framework (LnMOF) ([La(bpdc)Cl(DMF)] (1); bpdc2− = [1,1′-biphenyl]-4,4′-dicarboxylate, DMF = N,N-dimethylformamide) by introducing dual emission properties in a La3+ MOF scaffold through doping with the blue fluorescent 2,2′-diamino-[1,1′-biphenyl]-4,4′-dicarboxylate (dabpdc2−) and the red emissive Eu3+. With a careful adjustment of the relative doping levels of the lanthanide ions and bridging ligands, the color of the luminescence was modulated, while at the same time the photophysical characteristics of the two chromophores were retained. In addition, the photophysical properties of the parent MOF (1) and its doped counterparts with various dabpdc2−/bpdc2− and Eu3+/La3+ ratios and the photoinduced energy transfer pathways that are possible within these materials are discussed. Finally, the temperature dependence study on the emission profile of a doped analogue containing 10% dabpdc2− and 2.5% Eu3+ (7) is presented, highlighting the potential of this family of materials to behave as temperature sensors.

中文翻译：

---

配体和金属共掺杂镧系元素-有机骨架中的双发射：颜色调节和温度相关发光

在这项研究中，我们报告了镧系金属有机骨架 (LnMOF) ([La(bpdc)Cl(DMF)] (1); bpdc2− = [1,1'-联苯]-4,4 '-二羧酸盐，DMF = N,N-二甲基甲酰胺）通过掺杂蓝色荧光 2,2'-二氨基-[1,1'-联苯]-4,4'-二羧酸盐在 La3+ MOF 支架中引入双重发射特性(dabpdc2−) 和红色发光 Eu3+。通过仔细调整镧系离子和桥连配体的相对掺杂水平，可以调节发光颜色，同时保留两种发色团的光物理特性。此外，讨论了母体 MOF (1) 及其具有各种 dabpdc2-/bpdc2- 和 Eu3+/La3+ 比率的掺杂对应物的光物理性质，以及这些材料中可能存在的光致能量转移途径。最后，介绍了对含有 10% dabpdc2- 和 2.5% Eu3+ (7) 的掺杂类似物的发射曲线的温度依赖性研究，突出了该系列材料作为温度传感器的潜力。