Sequential binding of large molecules to hairy MOFs

Area of Science:

• Materials Science
• Chemistry
• Nanotechnology

Background:

• Metal-organic frameworks (MOFs) exhibit dynamic properties.
• Controlling MOF surface morphology is crucial for advanced applications.

Purpose of the Study:

• To develop a simple method for transforming smooth MOF crystals into "hairy" structures.
• To enhance the chemisorption capacity of MOFs for large molecules.
• To enable sequential binding of different proteins onto MOF surfaces.

Main Methods:

• Treatment of MOF crystals with salts to induce morphological changes.
• Etching processes to further modify MOF structures.
• Chemisorption experiments to quantify molecular uptake.
• Protein binding assays to demonstrate sequential adsorption.

Main Results:

• Transformation of smooth MOFs into "hairy" MOFs via salt treatment.
• A 120-fold enhancement in chemisorption capacity for large molecules.
• Successful sequential adsorption of different proteins onto the modified MOFs.

Conclusions:

• Salt-induced morphological transformation is an effective strategy to enhance MOF functionality.
• Modified MOFs show significant potential for applications requiring high-capacity adsorption and selective binding, such as in separation and sensing.
• The developed method offers a facile route to engineer MOF surfaces for complex molecular interactions.