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Selective CO2 adsorption and theoretical simulation of a stable Co(II)-based metal–organic framework with tunable crystal size

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Abstract

A three-fold interpenetrated metal–organic framework [Co2(OBA)4(PTD)·3DMF·CH3CH2OH·5H2O]n (1) has been synthesized by utilizing 4,4′-oxybis(benzoic acid) (H2OBA) as the linker, 6-(pyridin-4-yl)-1,3,5-triazine-2,4-diamine (PTD) as the ligand, and CoCl2·6H2O via solvothermal method. Compound 1 exhibits not only a high uptake capacity for CO2 molecules with an estimated high sorption heat (50.6 kJ mol−1 at zero loading), but also a significant selective adsorption of CO2 over CH4, which may be ascribed to the presence of proper-sized pores with high polarity, amine groups and triazine rings of PTD linker decorating the pores. Meanwhile, the Grand Canonical Monte Carlo (GCMC) simulations of CO2 adsorption of compound 1 demonstrate that CO2 molecules are preferentially adsorbed around the PTD ligands. Furthermore, complex 1 displays a relatively high adsorption capacity of H2 (101.7 cm3 g−1 at 1 bar) under 77 K.

Graphical abstract: Selective CO2 adsorption and theoretical simulation of a stable Co(ii)-based metal–organic framework with tunable crystal size

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Publication details

The article was received on 13 Nov 2018, accepted on 14 Dec 2018 and first published on 17 Dec 2018


Article type: Paper
DOI: 10.1039/C8CE01942H
Citation: CrystEngComm, 2019, Advance Article

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    Selective CO2 adsorption and theoretical simulation of a stable Co(II)-based metal–organic framework with tunable crystal size

    B. Qin, B. Zhou, Z. Cui, L. Zhou, X. Zhang, W. Li and J. Zhang, CrystEngComm, 2019, Advance Article , DOI: 10.1039/C8CE01942H

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