Title: Pore Aperture Control Toward Size‐Exclusion‐Based Hydrocarbon Separations

Journal Article · · Angewandte Chemie
 [1]; ORCiD logo [2];  [2]; ORCiD logo [3];  [4]; ORCiD logo [2]; ORCiD logo [5]
  1. Department of Chemistry Northwestern University 60208 Evanston IL USA, Institute of Chemistry Shah Abdul Latif University 66020 Khairpur Sindh Pakistan
  2. Department of Chemistry Northwestern University 60208 Evanston IL USA
  3. Department of Chemical and Biological Engineering Northwestern University 60208 Evanston IL USA
  4. Integrated Molecular Structure and Education Center Northwestern University 60208 Evanston IL USA
  5. Department of Chemistry Northwestern University 60208 Evanston IL USA, Department of Chemical and Biological Engineering Northwestern University 60208 Evanston IL USA

Abstract Metal–organic frameworks (MOFs) have been proposed as a promising material for non‐thermal chemical separations owing to their high structural diversity and tunability. Here, we report the synthesis of a zinc‐based MOF containing a three‐dimensional (3D) linker, bicyclo[2.2.2]octane‐1,4‐dicarboxylic acid, with high thermal stability towards the separation of hexane isomers. The incorporation of the 3D linker enhances the structural stability and provides well‐defined pore apertures/channels with sub‐Ångstrom precision. This precision allowed for the separation of similarly sized hexane isomers based on subtle differences in their kinetic diameters. Multi‐component liquid phase batch experiments confirmed the separation of hexanes mixture into linear, monobranched, and dibranched isomers. This work represents a significant milestone in the construction of stable Zn‐based MOFs and the incorporation of 3D linkers as a potential solution to challenging separations.

Sponsoring Organization:
USDOE
Grant/Contract Number:
FG02-08ER15967
OSTI ID:
1960340
Journal Information:
Angewandte Chemie, Journal Name: Angewandte Chemie Journal Issue: 16 Vol. 135; ISSN 0044-8249
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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