金属-有机框架化合物在荧光分子温度计中的应用

In recent years, luminescent molecular thermometers (LMTs) have attracted an enormous amount of interest for their advantage over other thermometers, such as quick response speed, high sensitivity, and noninvasive operation, strong anti-interference of electric or magnetic field and temperature measurement in small spaces. In this research, the metal-organic frameworks (MOFs) will be applied to the development of new fluorescent molecular thermometers with high accuracy and sensitivity which can be used in different temperature range and spaces. Firstly, a series of organic ligands will be designed and synthesized. Secondly, MOFs with great fluorescent properties will be constructed by the reactions of the organic ligands and rare earth ions. Thirdly, two or even more parameters will be introduced to the system by mixing rare earth ions, modifying organic ligands, or involving the guest organic luminescent molecular to characterize the fluorescence properties with changes of the temperature, so as to improve the precision and sensitivity of LMTs. Lastly, the mechanism will be explored to instruct the preparation of this new kinds of LMTs in future.

近年来，荧光分子温度计因其相较于传统温度计具有响应速度快，灵敏度高，无创操作，抗强电场或磁场干扰，能在微米级环境下工作等优势成为研究的热点。本项目拟将金属-有机框架化合物（MOFs）应用于开发具有高精确度、高灵敏度，能在不同温度范围和空间范围内使用的新型荧光分子温度计。拟设计合成一系列有机配体，与稀土离子构建具有良好荧光性质的MOFs；通过掺杂混合的稀土离子、修饰有机配体、引入客体有机发光分子等方法，引入两个或两个以上的参数来表征体系的荧光性质随温度的变化，从而提高荧光分子温度计的精确度和灵敏度；探讨不同体系荧光性质随温度变化的机理，以期总结出规律性用以指导该类新材料的合成。

近年来，荧光分子温度计因其相较于传统温度计具有响应速度快，灵敏度高，无创操作，抗强电场或磁场干扰，能在微米级环境下工作等优势成为研究的热点。本项目制备了多种稀土型的金属-有机框架化合物，通过掺杂不同的稀土离子，用不同稀土离子发光强度的比值来表征荧光性质随温度的变化，从而提高荧光分子温度计的精确度和灵敏度。其中，九核稀土金属-有机框架化合物在77K-260K温度区间内展现出了良好的线性关系，灵敏度达到4.95%，有望应用于温度探针。通过本项目的探索，期望能为该材料后续合成制备提供指导。