Coumarin 7 functionalized europium-based metal-organic-framework luminescent composites for dual-mode optical thermometry
Coumarin 7 functionalized europium-based metal-organic-framework luminescent composites for dual-mode optical thermometry
复制标题
用于双模光学测温的香豆素7功能化铕基金属有机框架发光复合材料
DOI：
10.1039/d0tc03365k
复制
发表时间：
2020-10-14
影响因子：
6.4
通讯作者：
Xu, Yan
中科院分区：
文献类型：
--
作者：
Liu, Jiaqiang;Yue, Xizhuang;Xu, Yan
开发高可靠性、高灵敏度、多模温度传感性能的非接触式光学测温探头一直是一个巨大的挑战。本文利用铕基金属有机骨架（Eu-MOF）和表面固定化分子染料（香豆素7），通过简单的溶剂热法和后修饰策略，成功制备了双发光复合材料。得益于Eu（3+）与香豆素7染料分子在10℃~ 90℃范围内的荧光强度比（FIRs）的线性响应，该复合材料在90℃时的最大相对温度灵敏度（S-r）为0.50%℃（-1）。此外，观察到的香豆素7发射的红移与温度显示表明，染料固定的MOF复合材料具有双模光学热敏机制。研究了其优异的可重用性和温度传感机制。这些结果证明了香豆素7功能化Eu-MOF复合材料作为温度传感应用的双模光学温度计的潜力。
Developing a highly reliable non-contact optical thermometer probe with excellent sensitivity and multi-mode temperature sensing behaviours is always a great challenge. Here, dual-emitting luminescent composites fabricated using a europium-based metal-organic framework (Eu-MOF) and surface-immobilized molecular dye (Coumarin 7) were successfully prepared by a simple solvothermal method, followed by a post-modification strategy. Benefiting from the linear response in fluorescence intensity ratios (FIRs) of Eu(3+)to Coumarin 7 dye molecules in the temperature range from 10 degrees C to 90 degrees C, the composite demonstrated the maximum relative temperature sensitivity (S-r) of 0.50% degrees C(-1)at 90 degrees C. Moreover, the observed red-shift of Coumarin 7 emission with the temperature readout suggests a dual-mode optical thermal sensing mechanism in the dye-immobilized MOF composite. Their excellent reusability and temperature sensing mechanisms have been also investigated. These results demonstrate the potential of the Coumarin 7 functionalized Eu-MOF composite as a dual-mode optical thermometer for temperature sensing applications.