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The effect of structural modifications on the thermal stability, melting points and ion interactions for a series of tetraaryl-phosphonium-based mesothermal† ionic liquids

Abstract

A family of mesothermal ionic liquids comprised of tetraarylphosphonium cations and the bis(trifluoromethanesulfonyl)amidate anion are shown to be materials of exceptional thermal stability, enduring (without decomposition) heating in air at 300oC for three months. It is further established that three specific structural elements – phenoxy, phenacyl, and phenyl sulfonyl – can be present in the cation structures without compromising their thermal stability, and that their incorporation has specific impacts on the melting points of the salts. Most importantly, it is shown that the ability of such a structural component to lower a salt melting point is tied to its ability to lower cation-cation repulsions in the material.

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Publication details

The article was received on 13 Sep 2017, accepted on 10 Nov 2017 and first published on 10 Nov 2017


Article type: Paper
DOI: 10.1039/C7CP06278H
Citation: Phys. Chem. Chem. Phys., 2017, Accepted Manuscript
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    The effect of structural modifications on the thermal stability, melting points and ion interactions for a series of tetraaryl-phosphonium-based mesothermal† ionic liquids

    J. H. Davis, Jr, B. Rabideau, K. N. West, E. A. Salter, A. C. Stenson, A. Wierzbicki, M. Soltani, C. G. Cassity, B. Siu, J. L. McGeehee, K. J. Strickland and M. Vo, Phys. Chem. Chem. Phys., 2017, Accepted Manuscript , DOI: 10.1039/C7CP06278H

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