Issue 21, 2023

Efficient iodine capture by metal–organic cubes based on hexanuclear vanadium clusters

Abstract

The cube is the only regular hexahedron among the Platonic solids, but supramolecules with a cubic configuration have rarely been reported. Herein, two isostructural metal–organic cubes VMOC-6 and VMOC-7 with large cavities are successfully synthesized by face-directed self-assembly of concave hexanuclear vanadium clusters [V6O6(OCH3)9(XO4)(COO)3]n (X = S, n = 2; X = V, n = 1) and large-size nitrogen-containing tetravalent ligands. VMOC-6 and VMOC-7 are the largest metal–organic cubes based on metal clusters with an outer diameter of 28.47 × 28.17 × 28.44 Å3 and an inner cavity volume of 7785.657 Å3. Moreover, the cages can capture volatile iodine vapor with an uptake value of up to 1.83 g g−1, which is superior to those of most metal–organic materials. Mechanistic studies have shown that their good adsorption capacity is closely related to the presence of large internal cavities, electron-donating pyridine groups and redox-active V sites. The present work shows the potential application of these mesoporous MOPs in the treatment of iodine-containing nuclear waste.

Graphical abstract: Efficient iodine capture by metal–organic cubes based on hexanuclear vanadium clusters

Supplementary files

Article information

Article type
Research Article
Submitted
31 Jūl. 2023
Accepted
02 Sept. 2023
First published
05 Sept. 2023

Inorg. Chem. Front., 2023,10, 6221-6228

Efficient iodine capture by metal–organic cubes based on hexanuclear vanadium clusters

Y. Yang, Y. Fu, Y. Tian, L. Zhao, C. Qin, X. Wang and Z. Su, Inorg. Chem. Front., 2023, 10, 6221 DOI: 10.1039/D3QI01501G

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