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Photoluminescence: Applications01:14

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Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
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Three isostructural hexanuclear lanthanide-organic frameworks for sensitive luminescence temperature sensing over a

Tifeng Xia1,2, Wenqian Cao2, Lingling Guan2

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New lanthanide metal-organic frameworks (Ln-MOFs) show promise as sensitive thermometers. These materials exhibit high relative sensitivity for temperature sensing across a broad temperature range, crucial for research and technology.

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Area of Science:

  • Materials Science
  • Inorganic Chemistry
  • Nanotechnology

Background:

  • Temperature sensing is critical for scientific research and advanced technologies.
  • Lanthanide metal-organic frameworks (Ln-MOFs) offer tunable properties for sensing applications.

Purpose of the Study:

  • To synthesize and characterize novel isomorphic hexanuclear lanthanide metal-organic frameworks (Ln-MOFs).
  • To investigate the potential of these Ln-MOFs as ratiometric luminescence thermometers.
  • To evaluate their temperature sensing performance over a wide temperature range.

Main Methods:

  • Cluster-based synthesis strategy using three dicarboxylate ligands.
  • Characterization via single-crystal X-ray diffraction (SCXRD), powder X-ray diffraction (PXRD), thermogravimetric analysis (TGA), elemental analysis (EA), and Fourier transform infrared spectra (FT-IR).
  • Eu3+/Tb3+ co-doping for luminescence studies.

Main Results:

  • Three isomorphic hexanuclear Ln-MOFs, Ln(BPDC-xN) (Ln = Eu3+/Tb3+, x = 0, 1, 2), were successfully synthesized.
  • Eu0.001Tb0.999(BPDC-xN) (x = 0, 1, 2) demonstrated potential as ratiometric luminescence thermometers.
  • High relative sensitivity was observed across a wide temperature range (50 K to 300 K) due to efficient energy transfer.

Conclusions:

  • The developed Ln-MOFs are effective ratiometric luminescence thermometers.
  • The structural design facilitates efficient energy transfer, enabling broad-range temperature sensing.
  • These materials hold promise for applications requiring precise temperature monitoring.