New metal extractants and super-acidic ionic liquids derived from sulfamic acid†
Abstract
Sulfamic acid (NH3–SO3) is an acidic zwitterion with many applications. N-Alkylated derivatives are introduced, which can be used as a new class of metal extractants R2NH–SO3 and as new super-acidic ionic liquids [R2NH–SO3H][Tf2N]. The synthesis, properties and novel applications of this versatile platform are discussed.