Linker Vacancy Engineering of a Robust ftw–type Zr–MOF for Hexane Isomers Separation
Journal Article
·
· Angewandte Chemie (International Edition)
- Shenzhen Polytechnic, Guangdong (China); Rutgers University
- Chinese Academy of Sciences, Dalian (China)
- King Abdullah University of Science and Technology, Thuwal (Saudi Arabia)
- Shenzhen Polytechnic, Guangdong (China)
- Chinese Academy of Sciences, Dalian (China); University of Chinese Academy of Sciences, Beijing (China)
- Shenzhen Polytechnic, Guangdong (China); Rutgers University, Piscataway NJ (United States)
Discrimination of physically similar molecules by porous solids represents an important yet challenging task in industrially relevant chemical separations. Precisely controlled pore dimension and/or tailored pore surface functionality are crucial to achieve high-efficiency separation. Metal-organic frameworks (MOFs) are promising candidates for these challenging separations in light of their structural diversity as well as highly adjustable pore dimension/functionality. We report here a microporous, ftw-type Zr-based MOF structure, HIAM-410 (HIAM=Hoffmann Institute of Advanced Materials), built on hexanuclear Zr6 cluster and pyrene-1,3,6,8-tetracarboxylate (ptc4–). Its crystallographic structure has been determined using continuous rotation electron diffraction (cRED) technique combined with Rietveld refinement against powder X-ray diffraction data, aided by low-dose high-resolution transmission electron microscopy (HRTEM) imaging. The compound features exceptional framework stability that is comparable to the prototype MOF UiO-66. Interestingly, the linker vacancies in the pristine MOF structure could be partially restored by post-synthetic linker insertion. Its separation capability of hexane isomers is enhanced substantially upon the linker vacancy engineering. As a result, the restored structure exhibits efficient splitting of monobranched and dibranched hexane isomers at both room temperature and industrially relevant temperature.
- Research Organization:
- Wake Forest University, Winston-Salem, NC (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0019902
- OSTI ID:
- 2305734
- Journal Information:
- Angewandte Chemie (International Edition), Journal Name: Angewandte Chemie (International Edition) Journal Issue: 24 Vol. 62; ISSN 1433-7851
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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