Thermal and Transport Properties of Ionic Liquids Based on Benzyl-Substituted Phosphonium Cations

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• 作者：Katsuhiko Tsunashima ; Eiko Niwa ; Shun Kodama ; Masashi Sugiya ; Yasushi Ono
• 刊名：Journal of Physical Chemistry B
• 出版年：2009
• 出版时间：December 3, 2009
• 年：2009
• 卷：113
• 期：48
• 页码：15870-15874
• 全文大小：160K
• 年卷期：v.113,no.48(December 3, 2009)
• ISSN：1520-5207

文摘

The physicochemical properties of two novel ionic liquids based on benzyltriethylphosphonium and benzyltributylphosphonium cations are described in this report. It was found that both benzyl-substituted phosphonium cations gave low-melting salts in combination with a bis(trifluoromethylsulfonyl)amide anion. The thermogravimetric analysis suggested that the benzyl-substituted phosphonium ionic liquids showed higher thermal stability than those of not only the alkyl-substituted phosphonium ILs but also the corresponding benzyl-substituted ammonium compounds. The benzyl-substituted phosphonium ionic liquids also exhibited relatively high conductivities when compared to those of the corresponding ammonium compounds. These results indicate an improving effect of introducing a benzyl group into the phosphonium cations on both the thermal stability and the conductivity.