兰州大学机构库 >化学化工学院
Multinuclear solid-state NMR: Unveiling the local structure of defective MOF MIL-120
Zhang, Wanli1; Chen, SS(陈守顺)2; Terskikh, Victor V.3; Lucier, Bryan E.G.1; Huang, Yining1
2022-06-01
Source PublicationSolid State Nuclear Magnetic Resonance
ISSN0926-2040
Volume119
AbstractMetal-organic frameworks (MOFs) are emerging materials with many current and potential applications due to their unique properties. One critical feature is that the physical and chemical properties of MOFs are tunable. One of the methods for tuning MOF properties is to introduce defects by design for desired applications. Characterization of MOF defects is important, but very challenging due to the local nature and short-range ordering. In this work, we have introduced the ordered vacancies (the defects) in the form of the coordinatively unsaturated sites (CUSs) into the framework of MOF MIL-120(Al). The creation of ordered vacancies is achieved by replacing one quarter of the BTEC (1,2,4,5-benzenetetracarboxylate) with BDC (benzene-1,4-dicarboxylate) linkers. Both parent and defective MOFs were characterized by multinuclear solid-state NMR spectroscopy. 1H MAS NMR is used to characterize the hydrogen bonding in these MOFs, whereas 13C CP MAS NMR confirms unambiguously that the BDC is incorporated into the framework. One-dimensional 27Al MAS NMR provides direct evidence of the coordinatively unsaturated Al sites (the defects). Furthermore, 27Al 3QMAS experiments at 21.1 T allow direct identification of one penta-coordinated and three chemically inequivalent octahedral Al sites in the defective MIL-120(Al). Two of the above-mentioned octahedral Al sites are in the domain which appears defect-free. The third octahedral Al site is near the defective site. This work clearly demonstrates the power of solid-state NMR spectroscopy for characterization of defective MOFs. © 2022
KeywordAluminum Hydrogen bonds Light polarization Nuclear magnetic resonance spectroscopy Organometallics 'current Co-ordinatively unsaturated Dicarboxylates Emerging materials Local structure MAS NMR Metalorganic frameworks (MOFs) Multinuclear solid state NMR Property Solid-state NMR spectroscopy
PublisherElsevier B.V.
DOI10.1016/j.ssnmr.2022.101793
Indexed ByEI
Language英语
EI Accession Number20221311850886
EI KeywordsDefects
EI Classification Number541.1 Aluminum ; 741.1 Light/Optics ; 801.4 Physical Chemistry ; 804.1 Organic Compounds ; 951 Materials Science
Original Document TypeJournal article (JA)
Citation statistics
Document Type期刊论文
Identifierhttps://ir.lzu.edu.cn/handle/262010/477550
Collection化学化工学院
Corresponding AuthorHuang, Yining
Affiliation1.Department of Chemistry, The University of Western Ontario, London; ON; N6A 5B7, Canada;
2.Frontiers Science Center for Rare Isotopes, Lanzhou Magnetic Resonance Center, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou; 730000, China;
3.Metrology, National Research Council Canada, Ottawa; ON; K1A 0R6, Canada
First Author AffilicationCollege of Chemistry and Chemical Engineering
Corresponding Author AffilicationCollege of Chemistry and Chemical Engineering
Recommended Citation
GB/T 7714
Zhang, Wanli,Chen, Shoushun,Terskikh, Victor V.,et al. Multinuclear solid-state NMR: Unveiling the local structure of defective MOF MIL-120[J]. Solid State Nuclear Magnetic Resonance,2022,119.
APA Zhang, Wanli,Chen, Shoushun,Terskikh, Victor V.,Lucier, Bryan E.G.,&Huang, Yining.(2022).Multinuclear solid-state NMR: Unveiling the local structure of defective MOF MIL-120.Solid State Nuclear Magnetic Resonance,119.
MLA Zhang, Wanli,et al."Multinuclear solid-state NMR: Unveiling the local structure of defective MOF MIL-120".Solid State Nuclear Magnetic Resonance 119(2022).
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