Fluorous metal-organic frameworks with enhanced stability and high H2/CO2 storage capacities

Area of Science:

• Materials Science
• Chemistry
• Chemical Engineering

Background:

• Metal-organic frameworks (MOFs) are porous materials with tunable properties.
• Ligand functionalization is a key strategy for modifying MOF characteristics.
• Efficient gas adsorption and separation are critical for environmental and energy applications.

Purpose of the Study:

• To synthesize and characterize a new class of MOFs using ligand-functionalization.
• To investigate the impact of fluorine incorporation on MOF stability and gas adsorption.
• To evaluate the potential of these MOFs in mixed matrix membranes for CO2 separation.

Main Methods:

• Synthesis of novel MOFs via a ligand-functionalization strategy.
• Systematic adsorption studies of H2 and CO2 at various pressures.
• Theoretical calculations to interpret structure-property relationships.
• Fabrication of mixed matrix membranes using a selected MOF (TKL-107).

Main Results:

• A new class of MOFs was successfully synthesized.
• Fluorine incorporation significantly enhanced framework stability and H2/CO2 adsorption capacities.
• Theoretical studies provided insights into the observed property enhancements.
• Mixed matrix membranes incorporating TKL-107 demonstrated potential for CO2 separation.

Conclusions:

• Ligand-functionalization, particularly with fluorine, is an effective strategy for developing advanced MOFs.
• The synthesized MOFs exhibit superior stability and gas adsorption properties.
• These MOFs hold significant promise for practical applications in gas separation technologies, especially for CO2 capture.