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Porous Anionic Indium–Organic Framework with Enhanced Gas and Vapor Adsorption and Separation Ability

Authors

  • Dr. Yuanbiao Huang,

    1. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155, Yangqiao Road West, Fuzhou, 350002 (PR China)
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  • Zujin Lin,

    1. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155, Yangqiao Road West, Fuzhou, 350002 (PR China)
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  • Hongru Fu,

    1. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155, Yangqiao Road West, Fuzhou, 350002 (PR China)
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  • Dr. Fei Wang,

    1. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155, Yangqiao Road West, Fuzhou, 350002 (PR China)
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  • Min Shen,

    1. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155, Yangqiao Road West, Fuzhou, 350002 (PR China)
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  • Xusheng Wang,

    1. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155, Yangqiao Road West, Fuzhou, 350002 (PR China)
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  • Prof. Dr. Rong Cao

    Corresponding author
    1. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155, Yangqiao Road West, Fuzhou, 350002 (PR China)
    • State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155, Yangqiao Road West, Fuzhou, 350002 (PR China)

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Abstract

A three-dimensional microporous anionic metal–organic framework (MOF) (Et4N)3[In3(TATB)4] (FJI-C1, H3TATB=4,4′,4′′-s-triazine-2,4,6-triyltribenzoic acid) with large unit cell volume has been synthesized. Assisted by the organic cation group Et4N in the pores of the compound, FJI-C1 not only shows high adsorption uptakes of C2 and C3 hydrocarbons, but also exhibits highly selective separation of propane, acetylene, ethane, and ethylene from methane at room temperature. Furthermore, it also exhibits high separation selectivity for propane over C2 hydrocarbons and acetylene can be readily separated from their C2 hydrocarbons mixtures at low pressure due to the high selectivity for C2H2 in comparison to C2H4 and C2H6. In addition, FJI-C1 with hydrophilic internal pores surfaces shows highly efficient adsorption separation of polar molecules from nonpolar molecules. Notably, it exhibits high separation selectivity for benzene over cyclohexane due to the π–π interactions between benzene molecules and s-triazine rings of the porous MOF.

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