Pyridinedicarboxylate appended yttrium-organic framework for effective iodine capture and dye adsorption

The effective capture of iodine, a byproduct of nuclear fission, is paramount for environmental safety. This study introduces a novel metal-organic framework (MOF), [Y₂(pdc)₄(Me₂NH₂)₂]_n, YS-2, synthesized through a solvothermal reaction involving yttrium metal ions and 2,5-pyridine dicarboxylic acid. The MOF is characterized by its unique scu-3,6-I41/amd and dia; 4/6/c1; sqc6 topology and orthorhombic crystal system. YS-2 exhibits remarkable iodine adsorption capabilities in both vapor and solution phases, measuring 289.53 and 660 mg/g, respectively. Its structural features, including the presence of aromatic rings containing heteroatoms, contribute to its superior performance in capturing iodine. Furthermore, YS-2 demonstrates a remarkable ability to remove dye pollutants, such as methylene blue, from aqueous solutions. This research highlights the potential of YS-2 as a promising material for addressing environmental challenges associated with iodine contamination and water pollution. The better adsorption properties of YS-2 provide insights into its potential applications in environmental remediation.