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A Crystalline Polyimide Porous Organic Framework for Selective Adsorption of Acetylene over Ethylene

Open access
Jiang, Lingchang, Tian, Yuyang, Sun, Tu, Zhu, Youliang, Ren, Hao, Zou, Xiaoqin, Ma, Yanhang, Meihaus, Katie R., Long, Jeffrey R., Zhu, Guangshan·2018·Journal of the American Chemical Society

Abstract

The separation of acetylene from ethylene is a crucial process in the petrochemical industry, as even small acetylene impurities can lead to premature termination of ethylene polymerization. Herein, we present the synthesis of a robust, crystalline naphthalene diimide porous aromatic framework via imidization of linear naphthalene-1,4,5,8-tetracarboxylic dianhydride and triangular tris(4-aminophenyl)amine. The resulting material, PAF-110, exhibits impressive thermal and long-term structural stability, as indicated by thermogravimetric analysis and powder X-ray diffraction characterization. Gas adsorption characterization reveals that PAF-110 has a capacity for acetylene that is more than twice its ethylene capacity at 273 K and 1 bar, and it exhibits a moderate acetylene selectivity of 3.9 at 298 K and 1 bar. Complementary computational investigation of each guest binding in PAF-110 suggests that this affinity and selectivity for acetylene arises from its stronger electrostatic interaction with the carbonyl oxygen atoms of the framework. To the best of our knowledge, PAF-110 is the first crystalline porous organic material to exhibit selective adsorption of acetylene over ethylene, and its properties may provide insight into the further optimized design of porous organic materials for this key gas separation.

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Crossref · 10.1021/jacs.8b08174

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Metadata

Authors
Jiang, L., Tian, Y., Sun, T., Zhu, Y., Ren, H., Zou, X., Ma, Y., Meihaus, K. R., Long, J. R., & Zhu, G.
Venue
Journal of the American Chemical Society
Published
2018-10-26
Volume
140
Issue
46
Pages
15724-15730
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
OpenAlex
W2898196387
Cited by
282
References
52
FWCI
10.66
Type
journal article
Language
en
Open access
green

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