Characteristics of aggregation in aqueous solutions of dialkylpyrrolidinium bromides

► Self-aggregation properties in aqueous solution of pyrrolidinium-based ionic liquids. ► Interfacial tension, fluorescence spectroscopy, NMR, diffusion coefficients of ionic liquids in water. ► Enthalpy of micellization determined by isothermal titration calorimetry. ► Relationship between surfactant structure and thermodynamics of aggregation revealed.