A uranyl-based metal-organic framework featuring an eight-connected U₄L₂ cage for guest capture

Area of Science:

• Materials Science
• Chemistry
• Environmental Science

Background:

• Metal-organic frameworks (MOFs) offer tunable porosity for various applications.
• Uranyl-based MOFs are explored for their unique properties and potential uses.

Purpose of the Study:

• To synthesize and characterize a novel uranyl-based MOF, IHEP-50.
• To investigate the adsorption capabilities of IHEP-50 for dyes and gaseous iodine.

Main Methods:

• Solvothermal synthesis of the uranyl-based MOF (IHEP-50) using UO₂²⁺ and H₆DTPCA ligands.
• Characterization of the MOF structure and porosity.
• Adsorption experiments for charged dyes and gaseous iodine.

Main Results:

• A novel (3,6)-connected uranyl-based MOF, IHEP-50, with a 3D porous framework and 1D channels was successfully synthesized.
• IHEP-50 demonstrated selective adsorption of positively charged dyes over negatively charged and neutral ones.
• The MOF achieved a high adsorption capacity for gaseous iodine, reaching 253.5 mg g^-1.

Conclusions:

• IHEP-50 exhibits significant potential for selective dye removal and gaseous iodine capture.
• The porous structure of IHEP-50 is advantageous for guest molecule adsorption.
• This uranyl-based MOF presents a promising material for environmental remediation and gas storage.