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Title: Nanoporous Materials Can Tune the Critical Point of a Pure Substance

Journal Article · · Angewandte Chemie (International Edition)
 [1];  [1];  [2];  [3];  [4];  [5]
  1. Univ. of California, Berkeley, CA (United States)
  2. Univ. of California, Berkeley, CA (United States); Norwegian Univ. of Science and Technology, Trondheim (Norway)
  3. Univ. of California, Berkeley, CA (United States); Delft Univ. of Technology (Netherlands)
  4. Univ. of California, Berkeley, CA (United States; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  5. Univ. of California, Berkeley, CA (United States; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Inst. of Chemical Sciences and Engineering (Switzerland)
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Abstract Molecular simulations and NMR relaxometry experiments demonstrate that pure benzene or xylene confined in isoreticular metal–organic frameworks (IRMOFs) exhibit true vapor–liquid phase equilibria where the effective critical point may be reduced by tuning the structure of the MOF. Our results are consistent with vapor and liquid phases extending over many MOF unit cells. These results are counterintuitive since the MOF pore diameters are approximately the same length scale as the adsorbate molecules. As applications of these materials in catalysis, separations, and gas storage rely on the ability to tune the properties of adsorbed molecules, we anticipate that the ability to systematically control the critical point, thereby preparing spatially inhomogeneous local adsorbate densities, could add a new design tool for MOF applications.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Energy Frontier Research Centers (EFRC) (United States). Center for Gas Separations Relevant to Clean Energy Technologies (CGS)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0001015; AC02-05CH11231; 230534
OSTI ID:
1464131
Alternate ID(s):
OSTI ID: 1813881
Journal Information:
Angewandte Chemie (International Edition), Vol. 54, Issue 48; ISSN 1433-7851
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 11 works
Citation information provided by
Web of Science

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Cited By (4)

Desktop NMR and Its Applications From Materials Science To Organic Chemistry journal December 2017
Understanding the unique sorption of alkane- α , ω -diols in silicalite-1 journal August 2018
Multi- and instabilities in gas partitioning between nanoporous materials and rubber balloons journal February 2019
Fluctuation-Dissipation Theorems for Multiphase Flow in Porous Media journal December 2021

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36 MATERIALS SCIENCE
metal–organic frameworks
microporous materials
NMR relaxometry
phase diagrams
phase transitions