Effect of temperature and surfactant on the interaction of alkali metal ions and 18-crown-6 ether in binary and ternary system.

Abstract

18-crown-6 ether is widely accepted for their selectivity complexation and interaction with higher alkali metal ions [1, 4] even their binding and complexation efficiency is strongly influenced by the temperature and surfactant. [5, 6] In this research work, we investigate the effect of change of temperature and pressure of surfactant on the stability of the complex and interaction between 18-crown-6 and alkali metals (Rb+&Cs+) in a binary and ternary liquid systems. Viscosity and density measurements were employed to determine molecular interaction and thermodynamic parameters like ∆H, ∆S, and ∆G over a temperature range 298.15K, 308.15K. The excess molar volume (VE), Viscosity deviation and other interaction parameters data indicate that at lower temperature rise the binding affinity and complexation due to reduced the molecular movement, although cmc surfactant (1-decyl trimethyl ammonium bromide) micelle remarkably change the environment of 18-crown-6 [7]. The complexation and interaction of 18-crown-6 and alkali metal ion depending on the ion type. The interaction and thermodynamic parameters data revealed that alkali metal ions & 18-crown-6 accepted processes in supramolecular chemistry and recommend possible applications in selective alkali metal ion extraction and design the sensors [8-1]). The interaction order of 18-crown-6 with alkali metal salts as RbBr > RbCl > CsBr > CsCl.