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Solvent triggering structural changes for two terbium-based metal-organic frameworks and their photoluminescence

Dan Yue1, Yanyan Wang, Dong Chen

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Two novel terbium-based metal-organic frameworks (MOFs) were synthesized. Changing solvent content interconverted the MOFs, enabling detection of ascorbic acid and water content.

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Area of Science:

  • Materials Science
  • Inorganic Chemistry
  • Nanotechnology

Background:

  • Metal-organic frameworks (MOFs) offer tunable properties for sensing applications.
  • Terbium-based MOFs are explored for their unique luminescent and chemical characteristics.

Purpose of the Study:

  • To synthesize and characterize novel terbium-based MOFs.
  • To investigate the interconversion between MOF structures.
  • To evaluate the sensing capabilities of the obtained MOFs.

Main Methods:

  • Solvothermal synthesis of terbium-based MOFs.
  • Structural characterization using X-ray diffraction.
  • Investigation of MOF interconversion triggered by solvent content.
  • Performance evaluation for ascorbic acid and water detection.

Main Results:

  • Successfully obtained two terbium-based MOFs (TbPDBA-8 and TbPDBA-9) using the same ligand.
  • Demonstrated the transformation of TbPDBA-9 to TbPDBA-8 by altering solvent content.
  • Showcased the accelerated interconversion in the presence of sodium formate.
  • Reported the distinct detection performance of TbPDBA-8 and TbPDBA-9 for ascorbic acid and H2O content, respectively.

Conclusions:

  • The solvent content is a critical factor in controlling the structure of terbium-based MOFs.
  • The interconversion of MOFs provides a pathway for developing responsive materials.
  • These MOFs show potential for selective sensing of ascorbic acid and water.