Two new ionic liquids (ILs) with siloxane-functionalized cations and the weakly coordinating tetraalkoxyaluminate [Al(hfip)4]− (hfip=hexafluoroisopropoxy) are prepared and characterized by nuclear magnetic resonance (NMR), infrared (IR) and Raman spectroscopy. With melting points below 0 °C they qualify as room temperature ILs (RTILs). Their temperature-dependent viscosities and conductivities, together with those of two [Tf2N]− ILs with the same cations and a further siloxane-functionalized [Tf2N]− IL, are measured between 0 and 80 °C, and all are described by the Vogel–Fulcher–Tammann (VFT) equations. We note that the [Al(hfip)4]− ILs have lower viscosities than their [Tf2N]− analogues at all measured temperatures and higher conductivities at room temperature.
If you can't find a tool you're looking for, please click the link at the top of the page to "Go to old article view". Alternatively, view our Knowledge Base articles for additional help. Your feedback is important to us, so please let us know if you have comments or ideas for improvement.