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Issue 17, 2011
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A new force field model for the simulation of transport properties of imidazolium-based ionic liquids

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Abstract

A new, non-polarizable force field model (FFM) for imidazolium-based, room-temperature ionic liquids (RTILs), 1-ethyl-3-methyl-imidazolium tetrafluoroborate and 1-butyl-3-methyl-imidazolium tetrafluoroborate, has been developed. Modifying the FFM originally designed by Liu et al. (J. Phys. Chem. B, 2004, 108, 12978–12989), the electrostatic charges on interacting sites are refined according to partial charges calculated by explicit-ion density functional theory. The refined FFM reproduces experimental heats of vaporization, diffusion coefficients, ionic conductivities, and shear viscosities of RTILs, which is a significant improvement over the original model (Zh. Liu, Sh. Huang and W. Wang, J. Phys. Chem. B, 2004, 108, 12978–12989). The advantages of the proposed procedure include clarity, simplicity, and flexibility. Expanding the functionality of our FFM conveniently only requires modification of the electrostatic charges. Our FFM can be extended to other classes of RTILs as well as condensed matter systems in which the ionic interaction requires an account of polarization effects.

Graphical abstract: A new force field model for the simulation of transport properties of imidazolium-based ionic liquids

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Article information


Submitted
04 Dec 2010
Accepted
03 Mar 2011
First published
28 Mar 2011

Phys. Chem. Chem. Phys., 2011,13, 7910-7920
Article type
Paper

A new force field model for the simulation of transport properties of imidazolium-based ionic liquids

V. V. Chaban, I. V. Voroshylova and O. N. Kalugin, Phys. Chem. Chem. Phys., 2011, 13, 7910
DOI: 10.1039/C0CP02778B

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