Physicochemical Properties and Solubilization of Acid Red-27 Dye in CTABr Micellar Media: Enhanced Trapping and Interactional Investigation

This study delves into the investigation of the physicochemical characteristics and solubilization patterns of AR-27 dye within micellar environments containing the cationic surfactant CTABr, in conjunction with various electrolytes. The primary aim is to explore the augmented sequestration of AR-27 dye and its interplay with CTABr micelles through the utilization of UV-Visible Spectroscopy. The outcomes reveal a substantial enhancement in dye entrapment when electrolytes are introduced into CTABr micellar solutions compared to CTABr alone. Specifically, the partition coefficient (𝐾𝑥) for AR-27 dye in CTABr media devoid of salt stands at 5.29 x 10^5, whereas in combination with NaCl, KCl, and NH4Cl, the 𝐾𝑥 values escalate to 1.46 x 10^6, 1.84 x 10^6, and 2.57 x 10^6, respectively. Furthermore, the binding constants (𝐾𝒃) for CTABr, CTABr/NH4Cl, CTABr/KCl, and CTABr/NaCl are determined as 4.8 x 10^3, 4.4 x 10^4, 2.6 x 10^4, and 1.84 x 10^4 dm^3/mol, respectively. Lower Gibbs free energy values indicate a deeper penetration of dye molecules into the micelles. To sum up, this research underscores the pivotal role of incorporating electrolytes into CTABr micellar media in augmenting the sequestration of AR-27 dye. These findings offer valuable insights into the physicochemical attributes and solubilization dynamics of AR-27 dye within CTABr micellar environments, enhancing our comprehension of the interactions between the dye and micellar structures.