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A Partially Fluorinated Three-fold Interpenetrated Stable Metal-Organic Framework with Selective CO2 Uptake

Authors

  • Atanu Santra,

    1. Department of Chemistry, Indian Institute of Technology, Kanpur, 208016, India
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  • Myoung Soo Lah,

    Corresponding author
    1. Department of Chemistry, Ulsan National Institute of Science & Technology, Ulsan, 689–798, Korea
    • Myoung Soo Lah, Department of Chemistry, Ulsan National Institute of Science & Technology, Ulsan, 689–798, Korea

      Parimal K. Bharadwaj, Department of Chemistry, Indian Institute of Technology, Kanpur, 208016, India

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  • Parimal K. Bharadwaj

    Corresponding author
    1. Department of Chemistry, Indian Institute of Technology, Kanpur, 208016, India
    • Myoung Soo Lah, Department of Chemistry, Ulsan National Institute of Science & Technology, Ulsan, 689–798, Korea

      Parimal K. Bharadwaj, Department of Chemistry, Indian Institute of Technology, Kanpur, 208016, India

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  • Dedicated to Professor C. N. R. Rao on the Occasion of His 80th Birthday

  • Supporting Information for this article is available on the WWW under http://dx.doi.org/10.1002/zaac.201300639 or from the author.

Abstract

The hydrothermal reaction of Zn(NO3)2·H2O and a linear 2, 2′-bis-trifluoromethyl-biphenyl-4, 4′-dicarboxylic acid (H2L) ligand with –CF3 groups at each phenyl moiety of the biphenyl rings leads to the formation of a three-fold interpenetrated metal-organic framework (MOF), {[Zn2.66O0.66(L)2]·2H2O}n (1) at 180 °C. Single-crystal X-ray diffraction studies revealed that 1 is constructed from polynuclear clusters [Zn4O(COO)6] as secondary building units (SBU). These SBU are connected through the L2– to generate an overall three-dimensional structure with a 6-connected primitive cuboidal (α-Po) network. Thermogravimetric analyses and variable temperature powder X-ray diffraction measurements suggested that 1 is thermally stable. The porosity of 1 was estimated by N2, CO2, H2, and CH4 at different temperatures. The framework showed high selectivity of CO2 uptake over N2 and CH4. Furthermore, solid-state photoluminescence studies were carried out for complex 1 upon excitation at 275 nm at room temperature.

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