Three isostructural Eu3+/Tb3+ co-doped MOFs for wide-range ratiometric temperature sensing

Yang Yang; Yingzhe Wang; Yan Feng; Xuerui Song; Chen Cao; Guolin Zhang; Weisheng Liu

doi:10.1016/j.talanta.2019.120354

Three isostructural Eu³⁺/Tb³⁺ co-doped MOFs for wide-range ratiometric temperature sensing

Talanta. 2020 Feb 1:208:120354. doi: 10.1016/j.talanta.2019.120354. Epub 2019 Sep 16.

Authors

Yang Yang¹, Yingzhe Wang¹, Yan Feng¹, Xuerui Song¹, Chen Cao¹, Guolin Zhang¹, Weisheng Liu²

Affiliations

¹ Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China.
² Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China. Electronic address: liuws@lzu.edu.cn.

PMID: 31816801
DOI: 10.1016/j.talanta.2019.120354

Abstract

Temperature is an important physical parameter in the fields of human life, scientific research and industrial applications, which requires accurate measurements in physiology and pathology. The fast, accurate, non-invasive and non-touch detection of temperature is one of the most important research findings of lanthanide MOFs (LnMOFs). Herein, three dual-emitting LnMOFs hybrids Tb_1-xEu_xL (x = 0.05, 0.1 and 0.2) were fabricated as ratiometric MOF thermometers. In the binary co-doped system, the special energy transfer method (Tb³⁺ → Eu³⁺) makes thermometers more sensitive and accurate. The detection range and maximum relative sensitivity (S_m) were investigated and compared with the reportorial materials. Luminescence explorations show that Tb_0.9Eu_0.1L can be used for sensing temperature in the range of 303-423 K and with a S_m of 1.75% K^-1 at 423 K. Furthermore, PXRD experiment indicates that Tb_0.9Eu_0.1L has outstanding stability under simulated physiological environment, which makes the application of Tb_0.9Eu_0.1L to the detection of temperature in biomedical systems a reality.

Keywords: Energy transfer; LnMOFs; MOFs; Ratiometric MOF thermometers.