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Title: First principles Monte Carlo simulations of unary and binary adsorption: CO2, N2, and H2O in Mg-MOF-74

Journal Article · · ChemComm
DOI:https://doi.org/10.1039/C8CC06178E· OSTI ID:1477218
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [2]
  1. Univ. of Minnesota, Minneapolis, MN (United States). Department of Chemistry and Chemical Theory Center
  2. Univ. of Minnesota, Minneapolis, MN (United States). Department of Chemistry and Chemical Theory Center and Department of Chemical Engineering and Materials Science
  3. Univ. of California, Berkeley, CA (United States). Department of Chemistry and Chemical & Biomolecular Engineering; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division
  4. Univ. of Minnesota, Minneapolis, MN (United States). Department of Chemical Engineering and Materials Science

Dative bonding of adsorbate molecules onto coordinatively-unsaturated metal sites in metal–organic frameworks can lead to unique adsorption selectivities. However, the distortion of the electron density during dative bonding poses a challenge for force-field-based simulations. Here in this paper, we report first principles Monte Carlo simulations with the PBE-D3 functional for the adsorption of CO2, N2, and H2O in Mg-MOF-74, and obtain accurate predictions of the unary isotherms without any of the adjustments or fitting often required for systems with strong adsorption sites. Lastly, simulations of binary CO2/N2 and H2O/CO2 mixtures yield selectivities of 200 and 160, respectively, and indicate that predictions from ideal adsorbed solution theory need to be viewed with caution.

Research Organization:
Univ. of Minnesota, Minneapolis, MN (United States). Nanoporous Materials Genome Center
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences, and Biosciences Division
Contributing Organization:
Argonne Leadership Computing Facility; Minnesota Supercomputing Institute
Grant/Contract Number:
SC0008688; FG02-17ER16362; AC02-06CH11357; De-AC02-06CH11357
OSTI ID:
1477218
Alternate ID(s):
OSTI ID: 1467129
Journal Information:
ChemComm, Vol. 54, Issue 77; ISSN 1359-7345
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 32 works
Citation information provided by
Web of Science

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Coordination assembly of 2D ordered organic metal chalcogenides with widely tunable electronic band gaps journal January 2020
Five complexes based on a new racemic tetraoxaspiro ligand: correlation of potential coordination preferences with the structure, magnetic properties and luminescence properties journal January 2019
First principles methods using CASTEP journal January 2005