Higher Symmetry Multinuclear Clusters of Metal-Organic Frameworks for Highly Selective CO2 Capture

Jingjing Jiang; Zhiyong Lu; Mingxing Zhang; Jingui Duan; Wenwei Zhang; Yi Pan; Junfeng Bai

doi:10.1021/jacs.8b07589

Higher Symmetry Multinuclear Clusters of Metal-Organic Frameworks for Highly Selective CO₂ Capture

J Am Chem Soc. 2018 Dec 26;140(51):17825-17829. doi: 10.1021/jacs.8b07589. Epub 2018 Sep 20.

Authors

Jingjing Jiang¹, Zhiyong Lu², Mingxing Zhang¹, Jingui Duan³, Wenwei Zhang¹, Yi Pan¹, Junfeng Bai^{1

4}

Affiliations

¹ State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China.
² College of Mechanics and Materials , Hohai University , Nanjing 210098 , China.
³ State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering , Nanjing Tech University , Nanjing 210009 , China.
⁴ School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710119 , China.

PMID: 30223654
DOI: 10.1021/jacs.8b07589

Abstract

A new approach of finely tuning multinuclear clusters of metal-organic frameworks (MOFs) through symmetry-upgradingly isoreticular transformation was first presented and a bcu-type MOF, {[Cu₄(μ₄-O)Cl₂(IN)₄][CuCl₂]}_∞ (NJU-Bai35; NJU-Bai for Nanjing University Bai group), with cluster [Cu₄(μ₄-O)Cl₂(COO)₄N₄] of higher symmetry compared to the pristine MOF, was successfully synthesized. The symmetry upgrading implemented on the inorganic part triggers the adjustment of channels in NJU-Bai35 to fit CO₂ molecules, leading to a high CO₂ adsorption capacity (7.20 wt % at ∼0.15 bar and 298 K) and high selectivity of CO₂ over N₂ and CH₄ (275.8 for CO₂/N₂ and 11.6 for CO₂/CH₄) in NJU-Bai35. Breakthrough experiments further confirmed that NJU-Bai35 might be an excellent candidate for CO₂ capture and natural gas purification.