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Temperature–Programmed Separation of Hexane Isomers by a Porous Calcium Chloranilate Metal–Organic Framework

Journal Article · · Angewandte Chemie (International Edition)
 [1];  [2];  [3];  [4];  [4];  [5];  [3];  [6]
  1. Shenzhen Polytechnic, Guangdong (China); Rutgers University
  2. Shenzhen Polytechnic, Guangdong (China); South China University of Technology, Guangzhou (China)
  3. Wake Forest University, Winston-Salem, NC (United States)
  4. Shenzhen Polytechnic, Guangdong (China)
  5. South China University of Technology, Guangzhou (China)
  6. Shenzhen Polytechnic, Guangdong (China); Rutgers University, Piscataway, NJ (United States)

The full separation of alkane isomers as a function of different degrees of branching remains a daunting challenge due to its stringent requirement with respect to pore dimensions of the adsorbents. In this work, we report a novel microporous coordination network built on calcium (II) and chloranilate. The compound has a flexible framework and exhibits temperature-dependent adsorption behavior toward hexane isomers. At 30 °C, it accommodates substantial amounts of linear and monobranched hexanes but fully excludes their dibranched isomer, and at elevated temperatures such as 150 °C, it acts as a splitter for linear and branched alkanes. Its capability of efficient discrimination of hexane isomers as a function of branching is verified by experimental breakthrough measurements. Furthermore, ab initio calculations have uncovered the underlying selective size-exclusion separation mechanism.

Research Organization:
Wake Forest University, Winston-Salem, NC (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0019902
OSTI ID:
2305537
Alternate ID(s):
OSTI ID: 1902464
Journal Information:
Angewandte Chemie (International Edition), Journal Name: Angewandte Chemie (International Edition) Journal Issue: 50 Vol. 61; ISSN 1433-7851
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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