Maximizing the Potential of Electrically Conductive MOFs.

Area of Science:

• Materials Science
• Chemistry

Background:

• Electrically conductive metal-organic frameworks (EC-MOFs) offer unique properties for charge transport within porous structures.
• Current EC-MOFs often utilize 2D structures, limiting surface area and molecular accessibility.
• Design constraints and lack of functionalization methods restrict EC-MOF potential.

Purpose of the Study:

• To enhance molecular accessibility in EC-MOFs.
• To expand the functional diversity of EC-MOFs.
• To overcome limitations of 2D structures and restricted building blocks.

Main Methods:

• Utilized macrocyclic ligands with intrinsic pockets as building blocks.
• Employed pillar insertion strategy to create 3D EC-MOF structures.
• Tuned molecular-level building blocks and applied postsynthetic functionalization.

Main Results:

• Macrocyclic ligand-based EC-MOFs exhibited high surface areas and improved electrochemical performance.
• 3D EC-MOFs showed enhanced porosity and molecular accessibility.
• Functionalized EC-MOFs demonstrated ion selectivity and proton conductivity while maintaining electrical conductivity.

Conclusions:

• Strategies effectively enhance molecular accessibility and functional diversity in EC-MOFs.
• Overcoming structural and functional limitations propels EC-MOF utility.
• This work inspires rational development for future EC-MOF applications.