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    Metal–Organic Frameworks for Highly Selective Separation of Xylene Isomers and Single-Crystal X-ray Study of Aromatic Guest–Host Inclusion Compounds

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    Type
    Article
    Authors
    Sapianik, Aleksandr A. cc
    Dudko, Evgeny R.
    Kovalenko, Konstantin A. cc
    Barsukova, Marina O.
    Samsonenko, Denis G. cc
    Dybtsev, Danil N. cc
    Fedin, Vladimir P.
    KAUST Department
    Advanced Membranes and Porous Materials Research Center
    Functional Materials Design, Discovery and Development Research Group (FMD3), Advanced Membranes and Porous Materials Center (AMPM), Division of Physical Sciences and Engineering (PSE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
    Physical Science and Engineering (PSE) Division
    Date
    2021-03-17
    Online Publication Date
    2021-03-17
    Print Publication Date
    2021-03-31
    Embargo End Date
    2022-03-17
    Submitted Date
    2021-02-10
    Permanent link to this record
    http://hdl.handle.net/10754/668166
    
    Metadata
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    Abstract
    Separation of hydrocarbon molecules, such as benzene/cyclohexane and <i>o</i>-xylene/<i>m</i>-xylene/<i>p</i>-xylene, is relevant due to their widespread application as chemical feedstock but challenging because of their similar boiling points and close molecular sizes. Physisorption separation could offer an energy-efficient solution to this problem, but the design and synthesis of sorbents that exhibit high selectivity for one of the hydrocarbons remain a largely unmet challenge. Herein, we report a new heterometallic MOF with a unique tortuous shape of channels decorated with aromatic sorption sites [Li<sub>2</sub>Zn<sub>2</sub>(bpy)(ndc)<sub>3</sub>] (<b>NIIC-30(Ph)</b>, bpy = 4,4'-bipyridine, ndc<sup>2-</sup> = naphthalene-1,4-dicarboxylate) and study of its benzene/cyclohexane and xylene vapor and liquid separation. For an equimolar benzene/cyclohexane mixture, it is possible to achieve a 10-fold excess of benzene in the adsorbed phase. In the case of xylenes, microporous framework <b>NIIC-30(Ph)</b> demonstrates outstanding selective sorption properties and becomes a new benchmark for <i>m</i>-/<i>o</i>-xylene separation. In addition, <b>NIIC-30(Ph)</b> is stable enough to carry out at least three separation cycles of benzene/cyclohexane mixtures or ternary <i>o</i>-xylene/<i>m</i>-xylene/<i>p</i>-xylene mixtures both in the liquid and in the vapor phase. Insights into the performance of <b>NIIC-30(Ph)</b> are gained from X-ray structural studies of each aromatic guest inclusion compound.
    Citation
    Sapianik, A. A., Dudko, E. R., Kovalenko, K. A., Barsukova, M. O., Samsonenko, D. G., Dybtsev, D. N., & Fedin, V. P. (2021). Metal–Organic Frameworks for Highly Selective Separation of Xylene Isomers and Single-Crystal X-ray Study of Aromatic Guest–Host Inclusion Compounds. ACS Applied Materials & Interfaces. doi:10.1021/acsami.1c02812
    Sponsors
    Synthesis of new heterometallic MOF and its luminescence investigation were supported by the Russian Science Foundation grant (No.1973-00171), and X-ray structural analysis and sorption/selectivity investigation were supported by the Russian Science Foundation grant (No. 19-73-20087). The authors thank Dr. P. V. Dorovatovskii and Dr. V. A. Lazarenko for their assistance during synchrotron XRD experiments.
    Publisher
    American Chemical Society (ACS)
    Journal
    ACS Applied Materials & Interfaces
    DOI
    10.1021/acsami.1c02812
    PubMed ID
    33729772
    Additional Links
    https://pubs.acs.org/doi/10.1021/acsami.1c02812
    ae974a485f413a2113503eed53cd6c53
    10.1021/acsami.1c02812
    Scopus Count
    Collections
    Articles; Advanced Membranes and Porous Materials Research Center; Physical Science and Engineering (PSE) Division

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