Tailoring Energy Transfer in Mixed Eu/Tb Metal-Organic Frameworks for Ratiometric Temperature Sensing

被引:0
作者
Tang, Hui [1 ]
Cheng, Siyuan [1 ]
Zhang, Zhihui [1 ]
He, Mingyang [1 ]
Qian, Junfeng [1 ]
Li, Liang [2 ]
机构
[1] Changzhou Univ, Jiangsu Key Lab Adv Catalyt Mat & Technol, Changzhou 213164, Peoples R China
[2] Xinjiang Normal Univ, Sch Phys & Elect Engn, Xinjiang Key Lab Luminescence Minerals & Opt Funct, Urumqi 830054, Peoples R China
来源
MOLECULES | 2024年 / 29卷 / 16期
基金
中国国家自然科学基金;
关键词
luminescent thermometers; metal-organic frameworks; energy transfer; thermal sensitivity; lanthanides; LIGANDS; SINGLE;
D O I
10.3390/molecules29163914
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Eu/Tb metal-organic frameworks (Eu/Tb-MOFs), exhibiting Eu3+ and Tb3+ emissions, stand out as some of the most fascinating luminescent thermometers. As the relative thermal sensitivity model is limited to its lack of precision for fitting ratio of Eu3+ and Tb3+ emissions, accurately predicting the sensing performance of Eu/Tb-MOFs remains a significant challenge. Herein, we report a series of luminescent Eu/Tb-MOF thermometers, EuxTb1-xL, with excellent thermal sensitivity around physiological levels, achieved through the tuning energy transfer from ligands to Eu3+ and Tb3+ and between the Ln ions. It was found that the singlet lowest-energy excited state (S1) of the ligand and the higher triplet energy level (Tn) are crucial in the energy transfer processes of ligand -> Tb3+ and ligand -> Eu3+. This enables EuxTb1-xL to serve as an effective platform for exploring the impact of these energy transfer processes on the temperature-sensing properties of luminescent Eu/Tb-MOF thermometers. The relative thermal sensitivity is comparable to that of dual-center MOF-based luminescent thermometers operating at physiological levels. This study provides valuable insights into the design of new Eu/Tb thermometers and the accurate prediction of their sensing performance.
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页数:11
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