ILs have attracted the attention of researchers in recent decades. The number
of applications in which these unusual compounds show good performance has grown
dramatically in the last century. This chapter presents an overview of ionic liquids,
their structure, properties and general applications that have made them one of the
families of chemicals to which most research efforts have been devoted.
Keywords: Applications, Catalysis, Dissolution, Electrochemistry, Energy storage, Extraction, Ionic liquids, Properties, Polymerization reactions, Solvent, Synthesis, Separations, Synthesis of nanomaterials.