Bright blue emissions with temperature-dependent quantum yields from microporous metal-organic frameworks

Area of Science:

• Materials Science
• Chemistry
• Nanotechnology

Background:

• Metal-organic frameworks (MOFs) are porous materials with diverse applications.
• Luminescent MOFs are of interest for sensing and optoelectronic devices.
• Temperature-dependent luminescence is a key property for advanced material design.

Purpose of the Study:

• To synthesize and characterize two novel 2D microporous metal-organic frameworks.
• To investigate the temperature-dependent photoluminescence properties of these MOFs.
• To explore the potential of these materials in applications requiring tunable emission.

Main Methods:

• Solvothermal synthesis of 2D MOFs using a fluorophore ligand.
• Powder X-ray diffraction (PXRD) for structural analysis.
• Photoluminescence spectroscopy to measure quantum yields and emission spectra at variable temperatures.

Main Results:

• Successful assembly of two distinct 2D microporous MOF structures.
• Strong blue emissions were observed for both MOFs.
• Quantum yields for the first MOF ranged from 40.3% to 74.5% with decreasing temperature.
• Quantum yields for the second MOF ranged from 13.7% to 25.8% with decreasing temperature.

Conclusions:

• The synthesized 2D MOFs exhibit significant temperature-dependent luminescence.
• The fluorophore ligand enables tunable emission properties in the MOF structures.
• These materials show promise for temperature-sensing or light-emitting applications.