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Nano Research 2023, 16(7): 10652-10659 https://doi.org/10.1007/s12274-023-5634-x
Research Article | Issue | Published: 20 April 2023

Highly selective adsorption of light hydrocarbons in a HKUST-like MOF constructed from spirobifluorene-based octacarboxylate ligand by a substitution strategy

Show Author's Information Xinli Shi,  Yucong Zu,  Xilin Li,  Tongyi Zhao,  Hao Ren,  Fuxing Sun( )
State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, China
Keywords:
reticular chemistry, disorder, light hydrocarbons separation, substitution, HKUST-like metal-organic frameworks (MOFs), trace adsorption
Topics:
Gas adsorptionMethanol fuelsMicroporosity Organic frameworks
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Shi X, Zu Y, Li X, et al. Highly selective adsorption of light hydrocarbons in a HKUST-like MOF constructed from spirobifluorene-based octacarboxylate ligand by a substitution strategy. Nano Research, 2023, 16(7): 10652-10659. https://doi.org/10.1007/s12274-023-5634-x
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Abstract Full text Electronic supplementary material About this article

Metal-organic frameworks (MOFs) with HKUST-like tbo structures have been paid specific attention for gas sorption and separation because of their specific pore features. According to the geometric similarity of spirobifluorene and [Cu2(O2CR)4] paddlewheel secondary building units (Cu2 SBUs) in HKUST-1, we attempted to rationally construct a HKUST-like MOF by a substitution strategy. Using a judiciously designed octatopic carboxylate ligand, a copper-organic framework, JUC-220, was synthesized. The crystals of JUC-220 exhibited characteristic features in cubic with disorder, possibly due to the disorder substitution and high symmetry of tbo topology. Two related HKUST-like structure models were considered. Thanks to the suitable pore size and specific pore shapes, the adsorption selectivities of JUC-220 for C3H8/CH4 (5/85) and C2H6/CH4 (10/85) gas mixtures were as high as 736 and 46 respectively at 298 K and 1 bar. Specially, JUC-220 exhibited excellent trace adsorption performance of C3H8 and C2H6 as well as reverse adsorption behavior of C2H6/C2H4. Thus, JUC-220 serves as an example of HKUST-like MOF with disorder for light hydrocarbons separation and the implementation of substitution which can be used to explore more porous MOFs.


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About this article

Highly selective adsorption of light hydrocarbons in a HKUST-like MOF constructed from spirobifluorene-based octacarboxylate ligand by a substitution strategy

Show Author's information Xinli Shi, Yucong Zu, Xilin Li, Tongyi Zhao, Hao Ren, Fuxing Sun( )
State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, China

Abstract

Metal-organic frameworks (MOFs) with HKUST-like tbo structures have been paid specific attention for gas sorption and separation because of their specific pore features. According to the geometric similarity of spirobifluorene and [Cu2(O2CR)4] paddlewheel secondary building units (Cu2 SBUs) in HKUST-1, we attempted to rationally construct a HKUST-like MOF by a substitution strategy. Using a judiciously designed octatopic carboxylate ligand, a copper-organic framework, JUC-220, was synthesized. The crystals of JUC-220 exhibited characteristic features in cubic with disorder, possibly due to the disorder substitution and high symmetry of tbo topology. Two related HKUST-like structure models were considered. Thanks to the suitable pore size and specific pore shapes, the adsorption selectivities of JUC-220 for C3H8/CH4 (5/85) and C2H6/CH4 (10/85) gas mixtures were as high as 736 and 46 respectively at 298 K and 1 bar. Specially, JUC-220 exhibited excellent trace adsorption performance of C3H8 and C2H6 as well as reverse adsorption behavior of C2H6/C2H4. Thus, JUC-220 serves as an example of HKUST-like MOF with disorder for light hydrocarbons separation and the implementation of substitution which can be used to explore more porous MOFs.

Keywords: reticular chemistry, disorder, light hydrocarbons separation, substitution, HKUST-like metal-organic frameworks (MOFs), trace adsorption

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Publication history
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Acknowledgements

Publication history

Received: 15 November 2022
Revised: 13 February 2023
Accepted: 02 March 2023
Published: 20 April 2023
Issue date: July 2023

Copyright

© Tsinghua University Press 2023

Acknowledgements

Acknowledgements

This research work was supported by the National Natural Science Foundation of China (Nos. 21871105, 21975096, and 21501064). We thank the staff at BL17B1 beamline of the National Facility for Protein Science in Shanghai (NFPS), Shanghai Advanced Research Institute, Chinese Academy of Sciences (CAS), for providing technical support in X-ray diffraction data collection. We also thank Professor Rajamani Krishna from University of Amsterdam for the breakthrough calculations.

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