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    Direct Imaging of Tunable Crystal Surface Structures of MOF MIL-101 Using High-Resolution Electron Microscopy

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    Type
    Article
    Authors
    Li, Xinghua
    Wang, Jianjian
    Liu, Xin
    Liu, Lingmei
    Cha, Dongkyu
    Zheng, Xinliang
    Yousef, Ali A.
    Song, Kepeng
    Zhu, Yihan
    Zhang, Daliang
    Han, Yu cc
    KAUST Department
    Advanced Membranes & Porous Materials Center
    Advanced Membranes and Porous Materials Research Center
    Chemical Science
    Chemical Science Program
    Nanostructured Functional Materials (NFM) laboratory
    Physical Science and Engineering (PSE) Division
    KAUST Grant Number
    FCC/1/1972-19
    Date
    2019-07-19
    Embargo End Date
    2020-07-19
    Permanent link to this record
    http://hdl.handle.net/10754/656194
    
    Metadata
    Show full item record
    Abstract
    Metal–organic frameworks (MOFs) are often synthesized using various additives to modulate the crystallization. Here, we report the direct imaging of the crystal surface of MOF MIL-101 synthesized with different additives, using low-dose high-resolution transmission electron microscopy (HRTEM), and identify three distinct surface structures, at subunit cell resolution. We find that the mesoporous cages at the outermost surface of MIL-101 can be opened up by vacuum heating treatment at different temperatures, depending on the MIL-101 samples. We monitor the structural evolution of MIL-101 upon vacuum heating, using in situ X-ray diffraction, and find the results to be in good agreement with HRTEM observations, which leads us to speculate that additives have an influence not only on the surface structure but also on the stability of framework. In addition, we observe solid–solid phase transformation from MIL-101 to MIL-53 taking place in the sample synthesized with hydrofluoric acid.
    Citation
    Li, X., Wang, J., Liu, X., Liu, L., Cha, D., Zheng, X., … Han, Y. (2019). Direct Imaging of Tunable Crystal Surface Structures of MOF MIL-101 Using High-Resolution Electron Microscopy. Journal of the American Chemical Society, 141(30), 12021–12028. doi:10.1021/jacs.9b04896
    Sponsors
    This research was supported by competitive center funds (FCC/1/1972-19) to Y.H. from King Abdullah University of Science and Technology (KAUST). X. Liu was supported by National Natural Science Foundation of China (No. 21771029, 11811530631 and 21573034). Y. Zhu acknowledges the financial support from the National Natural Science Foundation of China (Grant No. 21771161) and Thousand Talents Program for Distinguished Young Scholars. This research used the resources of KAUST’s Core Laboratories facilities.
    Publisher
    American Chemical Society (ACS)
    Journal
    Journal of the American Chemical Society
    DOI
    10.1021/jacs.9b04896
    Additional Links
    http://pubs.acs.org/doi/10.1021/jacs.9b04896
    ae974a485f413a2113503eed53cd6c53
    10.1021/jacs.9b04896
    Scopus Count
    Collections
    Articles; Advanced Membranes and Porous Materials Research Center; Physical Science and Engineering (PSE) Division; Chemical Science Program

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