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Issue 8, 2010
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Ionicity in ionic liquids: correlation with ionic structure and physicochemical properties

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Abstract

Ionic liquids (ILs) are ambient temperature molten salts that have attracted considerable attention because of their negligible volatility, thermal stability, nonflammability, and high ionic conductivity. These remarkable properties result essentially from their ionic nature. Thus, the concept of ionicity of ILs (i.e. how ionic they are) is of great significance for characterising their properties. Here, we show the methodologies used to assess the ionic nature in ILs. On the basis of quantitative estimation of the ionicity, their dependence on ionic structure, polarity scales, and physicochemical properties is reviewed. The ionicity of certain ILs is also predicted from their physicochemical properties. The effects of different classes of ILs (e.g., protic ILs and lithium ILs) and binary systems consisting of ILs and other components on the ionicity are also discussed.

Graphical abstract: Ionicity in ionic liquids: correlation with ionic structure and physicochemical properties

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Publication details

The article was received on 13 Oct 2009, accepted on 15 Dec 2009 and first published on 12 Jan 2010


Article type: Perspective
DOI: 10.1039/B921462N
Citation: Phys. Chem. Chem. Phys., 2010,12, 1649-1658
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    Ionicity in ionic liquids: correlation with ionic structure and physicochemical properties

    K. Ueno, H. Tokuda and M. Watanabe, Phys. Chem. Chem. Phys., 2010, 12, 1649
    DOI: 10.1039/B921462N

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