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Selective CO2 Adsorption by a Triazacyclononane-Bridged Microporous Metal–Organic Framework

Authors

  • Guillaume Ortiz,

    1. Institut de Chimie Moléculaire de l'Université de Bourgogne, UMR 5260, CNRS, Université de Bourgogne, 9 avenue Alain Savary, 21078 Dijon Cedex (France), Fax: (+33) 380-39-61-17
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  • Dr. Stéphane Brandès,

    1. Institut de Chimie Moléculaire de l'Université de Bourgogne, UMR 5260, CNRS, Université de Bourgogne, 9 avenue Alain Savary, 21078 Dijon Cedex (France), Fax: (+33) 380-39-61-17
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  • Dr. Yoann Rousselin,

    1. Institut de Chimie Moléculaire de l'Université de Bourgogne, UMR 5260, CNRS, Université de Bourgogne, 9 avenue Alain Savary, 21078 Dijon Cedex (France), Fax: (+33) 380-39-61-17
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  • Prof. Roger Guilard

    Corresponding author
    1. Institut de Chimie Moléculaire de l'Université de Bourgogne, UMR 5260, CNRS, Université de Bourgogne, 9 avenue Alain Savary, 21078 Dijon Cedex (France), Fax: (+33) 380-39-61-17
    • Institut de Chimie Moléculaire de l'Université de Bourgogne, UMR 5260, CNRS, Université de Bourgogne, 9 avenue Alain Savary, 21078 Dijon Cedex (France), Fax: (+33) 380-39-61-17
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Abstract

Metal–organic frameworks constructed by self-assembly of metal ions and organic linkers have recently been of great interest in the preparation of porous hybrid materials with a wide variety of functions. Despite much research in this area and the large choice of building blocks used to fine-tune pore size and structure, it remains a challenge to synthesise frameworks composed of polyamines to tailor the porosity and adsorption properties for CO2. Herein, we describe a rigid and microporous three-dimensional metal–organic framework with the formula [Zn2(L)(H2O)]Cl (L=1,4,7-tris(4-carboxybenzyl)-1,4,7-triazacyclononane) synthesised in a one-pot solvothermal reaction between zinc ions and a flexible cyclic polyaminocarboxylate. We have demonstrated, for the first time, that a porous rigid framework can be obtained by starting from a flexible amine building block. Sorption measurements revealed that the material exhibited a high surface area (1350 m2 g−1) and was the best compromise between capacity and selectivity for CO2 over CO, CH4, N2 and O2; as such it is a promising new selective adsorbent for CO2 capture.

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