Journal
CHEMICAL SCIENCE
Volume 13, Issue 21, Pages 6291-6296Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2sc01497a
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Funding
- National Natural Science Foundation of China [21971268, 22171295]
- Program for Guangdong Introducing Innovative and Entrepreneurial Teams [2017ZT07C069]
- Pearl River Talent Program [2017GC010623]
- Starry Night Science Fund of Zhejiang University Shanghai Institute for Advanced Study [SN-ZJU-SIAS-006]
- Sun Yat-Sen University
- EPSRC [EP/R029431]
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A zirconium metal-organic framework with a T-shaped benzimidazole strut was constructed and successfully used as a sponge-like material for selectively absorbing macrocyclic guests. The binding process was reversible and acid-base switchable. This study provides an alternative route for creating complex functional materials with interpenetrated structures.
An unprecedented zirconium metal-organic framework featuring a T-shaped benzimidazole strut was constructed and employed as a sponge-like material for selective absorption of macrocyclic guests. The neutral benzimidazole domain of the as-synthesized framework can be readily protonated and fully converted to benzimidazolium. Mechanical threading of [24]crown-8 ether wheels onto recognition sites to form pseudorotaxanes was evidenced by solution nuclear magnetic resonance, solid-state fluorescence, and infrared spectroscopy. Selective absorption of [24]crown-8 ether rather than its dibenzo counterpart was also observed. Further study reveals that this binding process is reversible and acid-base switchable. The success of docking macrocyclic guests in crystals via host-guest interactions provides an alternative route to complex functional materials with interpenetrated structures.
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