Thermophysico Properties of Binary and Ternary Liquid Mixtures At 298.15 And 308.15 K

Abstract

This paper looks at the effect of the surfactant and temperature on the complexation of various concentration of 18-crown-6 with aqueous alkali metal salt CsCl. The viscosities and densities of aqueous CsCl solutions with various concentrations of 18-crown-6 were determined in the presence of cationic surfactant, 1-Decyl trimethylammonium bromide (DTAB) at its critical micelle concentration (CMC). Measures were done at 298.15 K and 308.15 K. Excess molar volumes (V^E) and the deviations of viscosity (Δη) were obtained using the experimental data. The findings were explained through the molecular interactions and complexation of Cs⁺ ion with the cavity of 18-crown-6 in the presence and absence of the surfactant. Water is the high polarity solvent therefore Cs⁺ ion has more solvation.  In presence of surfactant reduce the ability of complexation. Generally, at higher temperature hydration of Cs⁺ ion with water decreases and enhances the complexation between 18-crown-6 with Cs⁺ ion.