Thermophysical Properties of Homologous Tetracyanoborate-Based Ionic Liquids Using Experiments and Molecular Dynamics Simulations

Koller TM, Ramos J, Schulz P, Economou IG, Rausch MH, Fröba AP (2017)

Publication Language: English

Publication Status: Published

Publication Type: Journal article

Publication year: 2017

Journal

Journal of Physical Chemistry B American Chemical Society

Publisher: AMER CHEMICAL SOC

Book Volume: 121

Pages Range: 4145-4157

Journal Issue: 16

DOI: 10.1021/acs.jpcb.6b12929

Abstract

Thermophysical properties of low-viscosity ionic liquids (ILs) based on the tetracyanoborate ([B(CN)(4)](-)) anion carrying a homologous series of 1-alkyl-3-methylimidazolium ([AMIM](+)) cations [EMIM](+) (ethyl), [BMIM]{(butyl), [HMIIVI](+) (hexyl), [OMIM]F (octyl), and [DMIM](+) (decyl) were investigated by experimental methods and molecular-dynamics (MD) simulations at atmospheric pressure and various temperatures. Spectroscopic methods based on nuclear magnetic resonance and surface light scattering were applied to measure the ion self-diffusion coefficients-and dynamic viscosity, respectively. In terms of MD simulations, a nonpolaritable molecular model for [EMIM] [B(CN)4] developed by optimization to experimental data was transferred to the other homologous ILs. For the appropriate description of the inter- and tntratnolecular interactions, precise and approximate force fields (FFs) were tested regarding their transferability within the homologous IL series, aiming at reducing the computational effort in molecular simulations. It is shown that at comparable simulated and, experimental densities, the calculated and measured data for viscosity and self-diffusion coefficients of the Its agree well mostly-within combined uncertainties, but deviate stronger for longer-chained ILs using an overly coarse FF model. For the [B(CN)(4)](-)based ILs studied, a comparison with literature data, the influence of varying alkyl-chain length in the cation on their Structural and thermophysical properties, and a correlation between self-diffusivity and viscosity are discussed.

Authors with CRIS profile

Thomas Manfred Koller Institute of Advanced Optical Technologies - Thermophysical Properties (AOT-TP) Peter Schulz Lehrstuhl für Chemische Reaktionstechnik Michael Rausch Institute of Advanced Optical Technologies - Thermophysical Properties (AOT-TP) Andreas Paul Fröba Institute of Advanced Optical Technologies - Thermophysical Properties (AOT-TP)

Additional Organisation(s)

Erlangen Graduate School in Advanced Optical Technologies

Involved external institutions

Spanish National Research Council / Consejo Superior de Investigaciones Científicas (CSIC) ES Spain (ES) National Centre for Scientific Research (NCSR) "Demokritos" GR Greece (GR)

How to cite

APA:

Koller, T.M., Ramos, J., Schulz, P., Economou, I.G., Rausch, M.H., & Fröba, A.P. (2017). Thermophysical Properties of Homologous Tetracyanoborate-Based Ionic Liquids Using Experiments and Molecular Dynamics Simulations. Journal of Physical Chemistry B, 121(16), 4145-4157. https://dx.doi.org/10.1021/acs.jpcb.6b12929

MLA:

Koller, Thomas Manfred, et al. "Thermophysical Properties of Homologous Tetracyanoborate-Based Ionic Liquids Using Experiments and Molecular Dynamics Simulations." Journal of Physical Chemistry B 121.16 (2017): 4145-4157.

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