A supramolecular porous material comprising Fe(ii) mesocates

Area of Science:

• Supramolecular chemistry
• Materials science
• Coordination chemistry

Background:

• Supramolecular chemistry enables the design of advanced materials.
• Metal-organic frameworks and related structures offer tunable porosity.
• The development of selective gas sorbents is crucial for environmental applications.

Purpose of the Study:

• To synthesize and characterize a dinuclear iron-based supramolecular building block.
• To construct a 3D microporous material from this building block.
• To evaluate the gas adsorption properties and selectivity of the resulting material.

Main Methods:

• Synthesis of the dinuclear iron mesocate [Fe2L3](BF4)4.
• Single-crystal X-ray diffraction for structural analysis.
• Gas adsorption isotherm measurements (CO2, N2).

Main Results:

• The dinuclear iron complex was successfully synthesized.
• Structural analysis revealed a 3D framework with accessible microporous channels formed via noncovalent interactions.
• Adsorption isotherms demonstrated high selectivity for carbon dioxide over nitrogen.

Conclusions:

• The dinuclear iron mesocate is an effective building block for creating permanently porous materials.
• The resulting material shows significant potential for selective carbon dioxide capture.
• This work highlights the utility of discrete supramolecular units in constructing functional porous frameworks.