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Issue 5, 2011
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Diffusion in ionic liquids: the interplay between molecular structure and dynamics

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Abstract

Diffusion in a series of ionic liquids is investigated by a combination of Broadband Dielectric Spectroscopy (BDS) and Pulsed Field Gradient Nuclear Magnetic Resonance (PFG NMR). It is demonstrated that the mean jump lengths increase with the molecular volumes determined from quantum-chemical calculations. This provides a direct means—via Einstein–Smoluchowski relation—to determine the diffusion coefficient by BDS over more than 8 decades unambiguously and in quantitative agreement with PFG NMR measurements. New possibilities in the study of charge transport and dynamic glass transition in ionic liquids are thus opened.

Graphical abstract: Diffusion in ionic liquids: the interplay between molecular structure and dynamics

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Publication details

The article was received on 02 Dec 2010, accepted on 22 Dec 2010 and first published on 14 Jan 2011


Article type: Communication
DOI: 10.1039/C0SM01404D
Citation: Soft Matter, 2011,7, 1678-1681
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    Diffusion in ionic liquids: the interplay between molecular structure and dynamics

    J. R. Sangoro, C. Iacob, S. Naumov, R. Valiullin, H. Rexhausen, J. Hunger, R. Buchner, V. Strehmel, J. Kärger and F. Kremer, Soft Matter, 2011, 7, 1678
    DOI: 10.1039/C0SM01404D

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