Immiscible electrolyte systems based on asymmetric hydrophobic room temperature ionic liquids

The effect on the melting point of the introduction of asymmetry in tetraalkylammonium halide salts has been investigated leading to the synthesis of new, hydrophobic (room temperature) ionic liquids suitable for liquid/liquid electrochemistry; one of these, tri(hexyl)decylammonium tetrakis(pentafluorophenyl)-borate, displays the largest electrochemical window observed to date for a biphasic room temperature ionic liquid system.