It should be noted that IL-based thermomorphic systems are rarely elaborated until now, especially in the field of catalytic applications.  The aim of this article is to provide a comprehensive review about thermomorphic mixtures of an IL with H2O and/or organic compounds.  Special focus is laid on their temperature dependence concerning UCST and LCST behavior, including systems with conventional ILs, metal-containing ILs, polymerized ILs, as well as the thermomorphic behavior induced via host-guest complexation.  A wide range of applications using thermoregulated IL systems in chemical catalytic reactions as well as enzymatic catalysis were also demonstrated in detail.  The conclusion is drawn that, due to their highly attractive behavior, thermoregulated ILs have already and will find more applications, not only in catalysis but also in other areas.
THERM