Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 133, Issue 15, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3493689
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Funding
- FWF Austrian Science Fund [P19807]
- Austrian Science Fund (FWF) [P19807] Funding Source: Austrian Science Fund (FWF)
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The Drude oscillator model is applied to the molecular ionic liquid 1-ethyl-3-methyl-imidazolium triflate. The range of manageable Drude charges is tested. The strength of the polarizability is systematically varied from 0% to 100%. The influence on the structure, single particle dynamics, and collective dielectric properties is investigated. The generalized dielectric constant can be decomposed into a dielectric permittivity, a dielectric conductivity, and an optical dielectric constant epsilon(infinity). The major part of the static generalized dielectric constant comes from the collective rotation of the ions, i.e., the dielectric permittivity. The translational contribution from the dielectric conductivity is about 58% of the dielectric permittivity. For the evaluation of the optical dielectric contribution, the computational dielectric theory was adapted to the case of heterogeneous polarizabilities. In case of 100% polarizability, it reaches a value of approximately 2. (C) 2010 American Institute of Physics. [doi:10.1063/1.3493689]
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