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    Synthesis and characterization of three amino-functionalized metal-organic frameworks based on the 2-aminoterephthalic ligand

    Access Status
    Fulltext not available
    Authors
    Yang, Y.
    Lin, R.
    Ge, L.
    Hou, L.
    Bernhardt, P.
    Rufford, T.
    Wang, Shaobin
    Rudolph, V.
    Wang, Y.
    Zhu, Z.
    Date
    2015
    Type
    Journal Article
    
    Metadata
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    Citation
    Yang, Y. and Lin, R. and Ge, L. and Hou, L. and Bernhardt, P. and Rufford, T. and Wang, S. et al. 2015. Synthesis and characterization of three amino-functionalized metal-organic frameworks based on the 2-aminoterephthalic ligand. Dalton Transactions. 44 (17): pp. 8190-8197.
    Source Title
    Dalton Transactions
    DOI
    10.1039/c4dt03927k
    ISSN
    1477-9226
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/4626
    Collection
    • Curtin Research Publications
    Abstract

    © The Royal Society of Chemistry 2015. The incorporation of Lewis base sites and open metal cation sites into metal-organic frameworks (MOFs) is a potential route to improve selective CO<inf>2</inf> adsorption from gas mixtures. In this study, three novel amino-functionalized metal-organic frameworks (MOFs): Mg-ABDC [Mg<inf>3</inf>(ABDC)<inf>3</inf>(DMF)<inf>4</inf>], Co-ABDC [Co<inf>3</inf>(ABDC)<inf>3</inf>(DMF)<inf>4</inf>] and Sr-ABDC [Sr(ABDC)(DMF)] (ABDC = 2-aminoterephthalate) were synthesized by solvothermal reactions of 2-aminoterephthalic acid (H<inf>2</inf>ABDC) with magnesium, cobalt and strontium metal centers, respectively. Single-crystal structure analysis showed that Mg-ABDC and Co-ABDC were isostructural compounds comprising two-dimensional layered structures. The Sr-ABDC contained a three-dimensional motif isostructural to its known Ca analogue. The amino-functionalized MOFs were characterized by powder X-ray diffraction, thermal gravimetric analysis and N<inf>2</inf> sorption. The CO<inf>2</inf> and N<inf>2</inf> equilibrium adsorption capacities were measured at different temperatures (0 and 25 °C). The CO<inf>2</inf>/N<inf>2</inf> selectivities of the MOFs were 396 on Mg-ABDC, 326 on Co-ABDC and 18 on Sr-ABDC. Both Mg-ABDC and Co-ABDC exhibit high heat of CO<inf>2</inf> adsorption (>30 kJ mol<sup>-1</sup>). The Sr-ABDC displays good thermal stability but had a low adsorption capacity resulting from narrow pore apertures.

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