In:
Inorganic Chemistry Frontiers, Royal Society of Chemistry (RSC), Vol. 9, No. 14 ( 2022), p. 3436-3443
Abstract:
Efficient, green, and economical removal of radioactive iodine (I 2 ) has drawn worldwide attention for the safe development of nuclear energy. Metal–organic frameworks (MOFs) have been demonstrated to be potential candidates for I 2 capture. Herein we report the synthesis of two novel isomeric MOFs bearing stilbene moieties for exceptionally high I 2 adsorption. [Cd(hsb-2)(tsbdc)]·0.5DMF (HSB-W8) and Cd(hsb-2)(tsbdc) (HSB-W9), which exhibit two-dimensional and twofold interpenetrated three-dimensional structures, respectively, have been assembled from hydrogenated Schiff base ligands, hsb-2 (1,2-bis(4′-pyridylmethylamino)-ethane) and trans-stilbene-4,4-dicarboxylate (tsbdc), and Cd(NO 3 ) 2 by the diffusion method. Such isomers arise from the different conformations of hsb-2 ligands controlled by diffusion temperatures. The π-electron-rich stilbene moieties render these Cd-MOFs ideal platforms for I 2 capture. The adsorption capacities of HSB-W8 and HSB-W9 in I 2 vapor at room temperature can reach up to 2.32 and 1.92 g g −1 , respectively, which are comparable to the best-performing MOF materials reported so far. Furthermore, pseudo-second-order (PSO) kinetic model analysis, Fourier transform infrared (FT-IR) spectroscopy, Raman spectral analysis, density functional theory (DFT) calculations, and control experiments were performed to shed light on host–guest interactions and the iodine adsorption mechanism. This work develops a rational strategy to design and synthesise functional MOF materials for iodine adsorption.
Type of Medium:
Online Resource
ISSN:
2052-1553
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2022
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