Print Email Facebook Twitter Polarizable force field for CO2 in M-MOF-74 derived from quantum mechanics Title Polarizable force field for CO2 in M-MOF-74 derived from quantum mechanics Author Becker, T. (TU Delft Engineering Thermodynamics) Lin, Li Chiang (Ohio State University) Dubbeldam, D. (TU Delft Engineering Thermodynamics; Universiteit van Amsterdam) Vlugt, T.J.H. (TU Delft Engineering Thermodynamics) Date 2018 Abstract On the short term, carbon capture is a viable solution to reduce human-induced CO2 emissions, which requires an energy efficient separation of CO2. Metal-organic frameworks (MOFs) may offer opportunities for carbon capture and other industrially relevant separations. Especially, MOFs with embedded open metal sites have been shown to be promising. Molecular simulation is a useful tool to predict the performance of MOFs even before the synthesis of the material. This reduces the experimental effort, and the selection process of the most suitable MOF for a particular application can be accelerated. To describe the interactions between open metal sites and guest molecules in molecular simulation is challenging. Polarizable force fields have potential to improve the description of such specific interactions. Previously, we tested the applicability of polarizable force fields for CO2 in M-MOF-74 by verifying the ability to reproduce experimental measurements. Here, we develop a predictive polarizable force field for CO2 in M-MOF-74 (M = Co, Fe, Mg, Mn, Ni, Zn) without the requirement of experimental data. The force field is derived from energies predicted from quantum mechanics. The procedure is easily transferable to other MOFs. To incorporate explicit polarization, the induced dipole method is applied between the framework and the guest molecule. Atomic polarizabilities are assigned according to the literature. Only the Lennard-Jones parameters of the open metal sites are parameterized to reproduce energies from quantum mechanics. The created polarizable force field for CO2 in M-MOF-74 can describe the adsorption well and even better than that in our previous work. To reference this document use: http://resolver.tudelft.nl/uuid:67d57b74-713c-4c15-9779-f80e076a84af DOI https://doi.org/10.1021/acs.jpcc.8b08639 ISSN 1932-7447 Source The Journal of Physical Chemistry C, 122 (42), 24488–24498 Part of collection Institutional Repository Document type journal article Rights © 2018 T. Becker, Li Chiang Lin, D. Dubbeldam, T.J.H. Vlugt Files PDF acs.jpcc.8b08639.pdf 1.96 MB Close viewer /islandora/object/uuid:67d57b74-713c-4c15-9779-f80e076a84af/datastream/OBJ/view