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Water Network in Room-Temperature Ionic Liquid: N,N-Diethyl-N-Methyl-N-2-Methoxyethyl Ammonium Tetrafluoroborate

  • Symposium: Neutron and X-Ray Studies of Advanced Materials
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Abstract

Crystal structures of room-temperature ionic liquid (RTIL)-H2O mixtures are determined by the X-ray diffraction method. The RTIL is N,N-diethyl-N-methyl-N-2-methoxyethyl ammonium tetrafluoroborate, [DEME][BF4]. At 0.9 mol pct H2O, two kinds of superstructures occur simultaneously without a strain. Also, the volume of the unit cell is very small only at 0.9 mol pct additives. This relates to the composite domain structure, including a twin-related one, as an elastic anomaly. At other water concentrations, such an extraordinary behavior is not observable. By assuming a sublattice having an equivalent lattice constant, a water network at 1 mol pct H2O is simulated using a Monte Carlo (MC) method. The network develops over the medium range in the simulation box.

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Acknowledgments

We appreciate Ms. M. Yasaka and Mr. A. Kishi, Rigaku Co., for the experimental support and helpful discussion. We also thank Dr. R. Forrest, University of Houston, for helpful with the manuscript.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, National Defense Academy, Yokosuka, 239-8686, Japan

    Hiroshi Abe (Associate Professor), Yusuke Imai (Graduate Student), Masami Aono (Research Associate) & Hitoshi Matsumoto (Professor)

  2. Department of Applied Physics, National Defense Academy, Yokosuka, 239-8686, Japan

    Takashi Arai (Professor)

  3. Department of Applied Chemistry, National Defense Academy, Yokosuka, 239-8686, Japan

    Takefumi Goto (Graduate Student), Yukihiro Yoshimura (Associate Professor) & Takahiro Takekiyo (Assistant Professor)

Authors
  1. Hiroshi Abe
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  2. Yusuke Imai
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  3. Takefumi Goto
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  4. Yukihiro Yoshimura
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  5. Masami Aono
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  6. Takahiro Takekiyo
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  7. Hitoshi Matsumoto
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Correspondence to Hiroshi Abe.

Additional information

This article is based on a presentation given in the symposium “Neutron and X-Ray Studies of Advanced Materials,” which occurred February 15–19, 2009, during the TMS Annual Meeting in San Francisco, CA, under the auspices of TMS, TMS Structural Materials Division, TMS/ASM Mechanical Behavior of Materials Committee, TMS: Advanced Characterization, Testing, and Simulation Committee, and TMS: Titanium Committee.

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Abe, H., Imai, Y., Goto, T. et al. Water Network in Room-Temperature Ionic Liquid: N,N-Diethyl-N-Methyl-N-2-Methoxyethyl Ammonium Tetrafluoroborate. Metall Mater Trans A 41, 1137–1143 (2010). https://doi.org/10.1007/s11661-009-9913-2

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  • DOI: https://doi.org/10.1007/s11661-009-9913-2

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