Tetraalkylphosphonium polyoxometalate ionic liquids: novel, organic-inorganic hybrid materials |
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Authors: | Rickert Paul G Antonio Mark R Firestone Millicent A Kubatko Karrie-Ann Szreder Tomasz Wishart James F Dietz Mark L |
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Affiliation: | Chemistry Division, Argonne National Laboratory, Argonne, Illinois 60439, USA. |
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Abstract: | Pairing of a Keggin or Lindqvist polyoxometalate (POM) anion with an appropriate tetraalkylphosphonium cation is shown to yield the first members of a new family of ionic liquids (ILs). Detailed characterization of one of them, an ambient-temperature "liquid POM" comprising the Lindqvist salt of the trihexyl(tetradecyl) phosphonium cation, by voltammetry, viscometry, conductimetry, and thermal analysis indicates that it exhibits conductivity and viscosity comparable to those of the one previously described inorganic-organic POM-IL hybrid but with substantially improved thermal stability. |
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