Citation: Ying Zhao, Yin-Hang Chai, Meng-Meng Zhai, Qin-Ying Jin, Xiaoyan Lu, Yi-Dan Qiao, Lu-Fang Ma. New functional metal–organic framework (MOF) based optical thermometer by the post-synthesis doping rare earth ions into MOF[J]. Chinese Chemical Letters, ;2026, 37(1): 111085. doi: 10.1016/j.cclet.2025.111085 shu

New functional metal–organic framework (MOF) based optical thermometer by the post-synthesis doping rare earth ions into MOF

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College of Chemistry and Chemical Engineering, Henan Key Laboratory of Function-Oriented Porous Materials, Luoyang Normal University, Luoyang 471934, China

mazhuxp@126.com

Received Date: 12 January 2025
Revised Date: 9 March 2025
Accepted Date: 12 March 2025
Available Online: 12 March 2025

Figures(8)

Ln@MOFs by anchoring rare metal ions (Ln) into metal–organic frameworks (MOFs) are proved to have great potential in the field of luminescent molecular thermometer. Nevertheless, the current research indicated that the poor structural stability and low sensitivity hindered their application scope. In this work, a new MOF Zn-450 luminescent thermometer with multiple emission fluorescence characteristics was synthesized by the combination of 3,3′,5,5′-biphenyl tetracarboxylic acid (H₄L) and Zn²⁺ ion under solvothermal conditions. Interestingly, a high relative sensitivity of 1.43 % K⁻¹ was found within 80–300 K based on Zn-450. Subsequently, two high-sensitivity luminescent Ln@MOFs (Ln = Eu and Tb) were further fabricated by doping rare earth ions into Zn-450 based on the post-synthesis strategy. Among them, the Eu@Zn-450 demonstrates various luminous behaviors while achieving an increased relative sensitivity of 1.63 % K⁻¹. In addition, the continuously visible red, pink, and purple luminescent emissions at the same temperature range were observed, suggesting that the Eu@Zn-450 could be utilized as a luminescent colorimetric molecular thermometer. Importantly, this work can present new possibilities for the development of rare earth-doped luminescence and its temperature sensing properties.
- MOFs,
- Optical thermometer,
- Post-synthesis functionalization,
- Rare metal ions,
- LED
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