Contiguous layer based metal–organic framework with conjugated π-electron ligand for high iodine capture. Issue 37 (25th August 2021)

• Record Type: Journal Article
• Authors: Xu, Tong; Li, Jiantang; Jia, Mingwei; Li, Guanghua; Liu, Yunling
• Is Part Of: Dalton transactions. Volume 50:Issue 37(2021)
• Page Start: 13096
• Page End: 13102
• Publication Date: 2021-08-25
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d1dt00947h
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : A novel 3D Cu-MOF with a cationic framework has been synthesized. It is constructed by directly interlocking contiguous 2D layers with square-shaped channels. The MOF exhibits high iodine adsorption capacities and excellent reusability. Abstract : Herein, a novel 3-dimensional (3D) Cu(ii ) metal–organic framework (MOF), [Cu3 (μ2 -O)2 ( p -tr2 Ph)2 (HCOO)][NO3 ]·3DMF·3H2 O (compound 1 ), which is constructed by directly interlocking regionalized hollow two-dimensional (2D) layers, has been conceived and solvothermally synthesized. Such a distinctive regionalized pore system effectively maintains the uniformity of the pore structure, isolates the counterions and bridging ligands in the partition layer, and endows compound 1 with high porosity. In consequence, compound 1 exhibits excellent adsorption ability of iodine in cyclohexane. The removal efficiency in cyclohexane solution (0.01 mol L −1 ) can reach up to 80% in 8 min, and the absorption ability towards iodine can reach about 1.15 g g −1 . Moreover, iodine can also be controllably released in ethanol. The release rate was up to 4 × 10 −5 mol L −1 min −1 . Furthermore, compound 1 also showed prominent recyclability due to the high stability, and the maximum sorption amount could be retained after 3 cycles. This study paves a new way towards opening up MOFs' potential application in capturing radioactive iodine to protect the environment.