“…In fact, the binding constants for imidazolium ionic liquids (ILs) and BSA are very low (in the order of 10 2 L mol −1 ) which indicate a very weak interaction between the ILs and the protein [58]. This situation clearly contrasts with the pyrrolidinium-based IL synthesized by Kumari et al [72] which showed K SV and K a values of 3.45 × 10 5 and 3.33 × 10 5 L mol −1 , respectively, in phosphate buffer (pH 7.4) at 298 K. Khan et al [65,70] studied the binding of amphiphilic drugs amitriptyline hydrochloride (AMT), promethazine hydrochloride (PMT), nortriptyline hydrochloride (NOT) and promazine hydrochloride (PMZ) with serum albumins HSA and BSA. Fluorescence quenching data for the drug-protein complexes yielded values of K SV = (2.51-5.28) × 10 4 L mol −1 , K a = (0.46-32.5) × 10 4 L mol −1 and G b values between −21.00 and −31.60 kJ mol −1 in Tris-HCl buffer solution (pH 7.4) at 310 K [65,70].…”