Conductive Lanthanide Metal-Organic Frameworks with Exceptionally High Stability.

Area of Science:

• Materials Science
• Nanotechnology
• Chemistry

Background:

• Electrically conductive metal-organic frameworks (MOFs) are crucial for energy technologies and sensors.
• High stability and conductivity under varied conditions are essential for practical MOF applications.

Purpose of the Study:

• To design and synthesize novel, stable, and conductive lanthanide-based MOFs (Ln-MOFs).
• To investigate the electron transport mechanisms and stability of these new MOFs.

Main Methods:

• Synthesis of single crystals of {[Ln4(μ4-O)(μ3-OH)3(INA)3(GA)3](CF3SO3)(H2O)6} (Ln = Gd, Tm, Lu).
• Characterization of electron transport along π-π stacked aromatic carbon rings.
• Assessment of conductivity stability under varying pH, temperature, and electric fields.

Main Results:

• The synthesized Ln-MOFs demonstrate robust electrical conductivity.
• Conductivity remained stable across a wide pH range (1-12), at 373 K, and under high electric fields (800,000 V/m).
• Electron transport occurs via π-π stacking in aromatic carbon rings, reinforced by strong coordination and hydrogen bonds.

Conclusions:

• The developed Ln-MOFs offer remarkable stability and conductivity, addressing key limitations in current MOF technology.
• These findings provide a foundation for designing next-generation stable and conductive MOFs for advanced applications.