Additive-Induced Supramolecular Isomerism and Enhancement of Robustness in Co(II)-Based MOFs for Efficiently Trapping Acetylene from Acetylene-Containing Mixtures

Yingxiang Ye; Shimin Chen; Liangji Chen; Jitao Huang; Zhenlin Ma; Ziyin Li; Zizhu Yao; Jindan Zhang; Zhangjing Zhang; Shengchang Xiang

doi:10.1021/acsami.8b11999

Additive-Induced Supramolecular Isomerism and Enhancement of Robustness in Co(II)-Based MOFs for Efficiently Trapping Acetylene from Acetylene-Containing Mixtures

ACS Appl Mater Interfaces. 2018 Sep 12;10(36):30912-30918. doi: 10.1021/acsami.8b11999. Epub 2018 Aug 30.

Authors

Yingxiang Ye¹, Shimin Chen¹, Liangji Chen¹, Jitao Huang^{1

2}, Zhenlin Ma¹, Ziyin Li¹, Zizhu Yao¹, Jindan Zhang¹, Zhangjing Zhang^{1

3}, Shengchang Xiang^{1

3}

Affiliations

¹ Fujian Provincial Key Laboratory of Polymer Materials, College of Chemistry and Materials Science , Fujian Normal University , 32 Shangsan Road , Fuzhou 350007 , P. R. China.
² College of Chemistry and Materials Science , Ningde Normal University , Ningde 352100 , P. R. China.
³ State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter , Chinese Academy of Sciences , Fuzhou 350002 , P. R. China.

PMID: 30124288
DOI: 10.1021/acsami.8b11999

Abstract

Although supramolecular isomerism in metal-organic frameworks (MOFs) would offer a favorable platform for in-depth exploring their structure-property relationship, the design and synthesis of the isomers are still rather a challenging aspect of crystal engineering. Here, a pair of supramolecular isomers of Co(II)-based MOFs (FJU-88 and FJU-89) can be directionally fabricated by rational tuning the additives. In spite of the fact that the isomers have the similar Co₃ secondary building units and organic linkers, they adopt distinct networks with acs and snw topologies, respectively, which derive from the conformational flexibility of the organic ligands. It is noteworthy that the porous structure of FJU-88 would be collapsed after removal of the solvent from the pores. But FJU-89a shows permanent porosity accompanied with unusual hierarchical micro- and mesopores and superior gas selective adsorption performance. In addition, FJU-89a can efficiently trap C₂H₂ from C₂H₂/CO₂ and C₂H₂/CH₄ mixture gases through fixed-bed dynamic breakthrough experiments.

Keywords: acetylene/carbon dioxide separation; acetylene/methane separation; hierarchically micro- and mesoporous; metal−organic frameworks; supramolecular isomerism.