Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 9, Issue 7, Pages 4075-4081Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ta10004h
Keywords
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Funding
- National Natural Science Foundations of China [21966002, 21871047, 21861017]
- Natural Science Foundation of Jiangxi Province of China [20181ACB20003]
- Training Program for Academic and Technical Leaders of Major Disciplines in Jiangxi Province [20194BCJ22010]
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This study presents a novel gigantic transitional-metal-uranyl drum-like nanocage with high stability and hydrophobic nature. The nanocage also demonstrates potential for highly effective and selective adsorption of trace SO2 in industrial desulfurization.
Constructing a gigantic hydrophobic metal-organic cage is not only scientifically important, but also synthetically challenging. Little is still known about the one the self-assembly and succedent host-guest recognition of transitional-metal-actinides cages. Herein, we report an unprecedented gigantic transitional-metal-uranyl [Co24U6] drum-like nanocage templated by a propyl-fused imidazolate dicarboxylate ligand. This nanocage-based MOF (namely Cage-U-Co-MOF) shows a high thermal and chemical stability in water and weak acidic/alkaline solution, as well as an impressively hydrophobic nature. More importantly, the breakthrough test on the Cage-U-Co-MOF bed disclosed this material as a highly effective and selective adsorbent for the removal of trace SO2 (ppm level) from SO2/CO2 or SO2/CO2/N-2 mixture under both drying and humid conditions, which suggests its superior application in industrial desulfurization. This work outlines a fundamental molecule-designing concept for preparing hydrophobic transitional-metal-actinides cages for advanced host-guest recognition.
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