Solid-State Luminescent Responsive Bilayer Architecture Based on 2D Lanthanide MOFs for Ratiometric NO₂ and SO₂...

Area of Science:

• Materials Science
• Environmental Science
• Chemistry

Background:

• Responsive materials for atmospheric toxic emissions monitoring are crucial.
• Luminescent metal-organic frameworks (LMOFs), especially lanthanide-based (LnMOFs), offer sharp emission and long lifetimes.
• Integrating LnMOFs into solid-state sensing platforms is challenging.

Purpose of the Study:

• Synthesize novel LnMOFs for solid-state sensing applications.
• Develop robust composite films for luminescence-based pollutant detection.
• Establish a ratiometric sensing platform for enhanced accuracy.

Main Methods:

• Synthesis of three isostructural LnMOFs using 2,5-bis(acetylamido)terephthalic acid.
• Embedding LnMOFs into polydimethylsiloxane (PDMS) to create luminescent composite films.
• Fabrication of a bilayer film configuration for ratiometric detection.

Main Results:

• Successfully synthesized Tb, Eu, and Gd-based LnMOFs with stable 2D frameworks.
• PDMS composite films retained luminescence in the solid state.
• Bilayer films demonstrated measurable luminescence changes upon exposure to NO2 and SO2.

Conclusions:

• The developed LnMOF-PDMS composite films are suitable for solid-state luminescence sensing.
• The bilayer configuration enables accurate, self-referencing ratiometric detection of atmospheric pollutants.
• This work provides a foundational approach for advanced luminescent sensing materials.