Preparation and characterization of novel ionic liquid based on benzotriazolium cation

Six novel ionic liquids based on benzotriazolium ion were synthesized by an improved method. These ionic liquids were characterized by IR, 1H NMR, and elemental analysis. Their melting point, thermal stability, conductivity, electrochemical window and solubility properties in common solvents were investigated. The results indicate that these ionic liquids show the higher thermal stability (up to 345 °C), the larger electrochemical window of 3 V, the peculiar solubility in traditional solvents and the excellent electrochemical medium in the electrochemical oxidation of naphthalene and ferrocene.