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Tetranuclear cobalt(II)–isonicotinic acid frameworks: selective CO2 capture, magnetic properties, and derived “Co3O4” exhibiting high performance in lithium ion batteries

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Abstract

Two new 3D cobalt metal–organic frameworks (MOFs), [Co4(CH3COO)(in)53-OH)2]·2H2O (1) and [Co4(SO4)2(in)4(DMF)2]·3DMF (2) (Hin = isonicotinic acid), have been prepared through the anion template method. Compound 1 consists of rare odd-number connected (9-connected) cubane-like SBUs, while compound 2 consists of 8-connected high-symmetry square-planar clusters. Magnetic studies indicate that compound 1 exhibits spin-canting antiferromagnetic ordering, while compound 2 shows antiferromagnetic behavior. At 273 K and 1 bar, compound 1 exhibits a high CO2 selectivity over CH4 and a significant CO2 uptake of 13.6 wt%, which is higher than that of 2 (8.5 wt%). Furthermore, compound 1 was then transformed into ultrasmall Co3O4 nanoparticles via simple but effective annealing treatment. Electrochemical measurements show that the Co3O4 nanospheres derived from compound 1 exhibited high and stable lithium storage properties (1100 mA h g−1 after 100 cycles at 200 mA g−1) and excellent rate capabilities.

Graphical abstract: Tetranuclear cobalt(ii)–isonicotinic acid frameworks: selective CO2 capture, magnetic properties, and derived “Co3O4” exhibiting high performance in lithium ion batteries

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Publication details

The article was received on 09 Oct 2018, accepted on 19 Nov 2018 and first published on 21 Nov 2018


Article type: Paper
DOI: 10.1039/C8DT04054K
Citation: Dalton Trans., 2018, Advance Article
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    Tetranuclear cobalt(II)–isonicotinic acid frameworks: selective CO2 capture, magnetic properties, and derived “Co3O4” exhibiting high performance in lithium ion batteries

    L. Zhou, H. Fan, B. Zhou, Z. Cui, B. Qin, X. Zhang, W. Li and J. Zhang, Dalton Trans., 2018, Advance Article , DOI: 10.1039/C8DT04054K

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