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Highly Robust Tetranuclear Cobalt-Based 3D Framework for Efficient C<sub>2</sub>H<sub>2</sub>/CO<sub>2</sub> and C<sub>2</sub>H<sub>2</sub>/C<sub>2</sub>H<sub>4</sub>Separations
12
Citations
33
References
2020
Year
A novel noninterpenetrated tetranuclear cobalt(II)-based metal-organic framework, (NH<sub>4</sub>)<sub>2</sub>·[Co<sub>4</sub>(μ<sub>3</sub>-OH)<sub>2</sub>(ina)<sub>2</sub>(pip)<sub>3</sub>]·4EtOH·H<sub>2</sub>O (simplified as <b>NbU-10</b>·S), constructed by mix linkers was synthesized by a hydrothermal method. Interestingly, the presence of a hydrophobic benzene ring in the organic linker makes <b>NbU-10</b>·S exhibit high stability in high temperature and even in aqueous solution over a wide pH range of about 4-13. Magnetic studies showed that the tetranuclear cobalt(II) units in <b>NbU-10</b>·S show dominant antiferromangetic properties. However, in the absence of Lewis basic functional sites and open metal sites in the material, <b>NbU-10</b> still displays high C<sub>2</sub>H<sub>2</sub>/CO<sub>2</sub> and C<sub>2</sub>H<sub>2</sub>/C<sub>2</sub>H<sub>4</sub> selectivity in ideal adsorbed solution theory calculations and dynamic breakthrough experiments. Moreover, density functional theory calculations were performed to identify the adsorption characteristics of different gas molecules.
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