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Robust multifunctional Zr-based metal–organic polyhedra for high proton conductivity and selective CO2 capture

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Abstract

New stable Zr-based metal–organic polyhedra (MOPs) have been designed and constructed through the self-assembly of a designed flexible sulfonate–carboxylate ligand, 1,2-bis(sodium-2-sulfonate-4-carboxyphenoxy)ethane (NaH2L), and the secondary building units (SBUs) of Cp3Zr33-O)(μ2-OH)3, (Cp = η5-C5H5). The MOPs feature candy-like cages and the anionic sulfonic groups on the organic ligand strengthened the stability of the MOPs (thermal stability and acid and alkali resistance) by forming strong multiple charge-assisted hydrogen bonds with the cationic SBUs. The unique cavities of this 3D porous framework endowed the MOPs with highly selective CO2 capture. The 2D H-bond networks obtained by the connection of coordinated water molecules and free water molecules between the discrete MOPs enabled a high proton conductivity of 1.41 × 10−3 S cm−1 at 30 °C, 98% relative humidity (RH) and a low activation energy of 0.225 eV for the proton transfer.

Graphical abstract: Robust multifunctional Zr-based metal–organic polyhedra for high proton conductivity and selective CO2 capture

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Publication details

The article was received on 26 Jan 2018, accepted on 22 Mar 2018 and first published on 23 Mar 2018


Article type: Paper
DOI: 10.1039/C8TA00858B
Citation: J. Mater. Chem. A, 2018, Advance Article
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    Robust multifunctional Zr-based metal–organic polyhedra for high proton conductivity and selective CO2 capture

    W. Xing, H. Li, X. Dong and S. Zang, J. Mater. Chem. A, 2018, Advance Article , DOI: 10.1039/C8TA00858B

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