Short communication
Heterometallic trinuclear cluster-based microporous metal-organic framework with high adsorption selectivity of CO2 over N2

https://doi.org/10.1016/j.inoche.2020.108202Get rights and content

Highlights

  • •

    A new heterometallic compound has been successfully synthesized via the second building subunit strategy.

  • •

    The compound features a 3D porous framework based on heterometallic trinuclear cluster subunit.

  • •

    The activated compound displays high adsorption selectivity for CO2 over N2 at ambient conditions.

Abstract

A new metal-organic compound, [Zn2Ca(bdc)3(H2O)2]n•x(solvent) (1 H2bdc = terephthalic acid), has been successfully constructed via the solvothermal reactions of H2bdc, Zn(NO3)2·6H2O and Ca(NO3)2·4H2O. Two symmetry-related Zn(II) ions and one Ca(II) are bridged by six bis-monodentate carboxylate groups together to form a heterometallic trinuclear [Zn2Ca(COO)6] cluster subunit. The linear bdc2− ligands further connected these trinuclear clusters into a 3D porous framework with 6-connected pcu topology. Remarkably, this porous compound can be stable up to 256 ℃ verified by the thermogravimetric analysis and powder X-ray diffraction analysis. Gas adsorption property investigations demonstrated that it shows high adsorption selectivity for CO2 over N2 at ambient conditions.

Section snippets

Declaration of Competing Interest

The authors declare no competing financial interest.

Acknowledgment

This work was supported by talent engineering training funds of Hebei Province (A2016002083), the Foundation of Hebei College of Industry and Technology (YF1903) the Foundation of Hebei Education Department (ZD2020193), and the Foundation of Hebei Education Department (ZD2018227), the Self-raised Funds Projects of Hebei Education Department (Z2020138).

References (18)

  • F.J. Teixeira et al.

    A 3D interpenetrated Co(II)-glutarate coordination polymer: synthesis, crystal structure, magnetic and adsorption properties

    Inorg. Chim. Acta

    (2020)
  • Y.Y. Huang et al.

    Employing heterometallic trinucler cluster as building subunit to construct a new coordination polymer with rare 3D inorganic -Cd-O-Ba-connectivity

    Inorg. Chim. Acta

    (2013)
  • B.Q. Song et al.

    Periodic tiling of triangular and square nanotubes in a cationic metal-organic framework for selective anion exchange

    Chem. Commun.

    (2015)
  • X.S. Wang et al.

    An anion metal-organic framework with lewis basic sites-rich towar charge-exclusive cationic dyes separation and size-selective catalytic reaction

    Inorg. Chem.

    (2016)
  • B. Zhu et al.

    A highly porous acylamide decorated MOF-505 analogue exhibiting high and selective CO2 gas uptake capability

    CrystEngComm

    (2018)
  • F. Hu et al.

    Building a robust 3D Ca-MOF by a new square Ca4O SBU for purification of natural gas

    Dalton Trans.

    (2020)
  • Y. Q. Chen, Y. Tian, S.L. Yao, J. Zhang, R.Y. Feng, Y.J. Bian, S. J. Liu, CdII-organic frameworks fabricated with a...
  • Y.X. Tan et al.

    Pore partition effect on gas sorption properties of an anionic metal-organic framework with exposed Cu2+ coordination sites

    Chem. Commun.

    (2011)
  • D.C. Hou et al.

    A microporous nickel-organic framework with an unusual 10-connected bct net and high capacity for CO2, H2 and hydrocarbons

    CrystEngComm

    (2013)
There are more references available in the full text version of this article.
1

Ying Song and Bing Wang contributed equally to this work.

View full text
© 2020 Published by Elsevier B.V.