Published Paper Details:

The present research aim to examination the intermolecular interactions between various concentration of 16-crown-6 with alkali metal ions (Li+, Na+, K++) in their aqueous solutions using the measurements of viscosity and density at 298.15K and 308.15K. Viscosities were measured by using an Ubbelohde viscometer, while densities were determined using Pycnometer. The experimental data used to calculate the Excess volume (VE), Viscosity deviation (??), Apparent molar volume(?v), to evaluate the strength of interaction and complexation between alkali metal ion with 18-crown-6. The results indicate significant variations in interaction and complexation with concentration of 18-crown-6. The sequence of interaction strength was found in accordance with the size of alkali metal ions and binding strength of 18-crown-6 with K+ ions showing stronger interaction and complexation effect as compared to Na+And Li+ ions. At higher temperature viscosity and densities decreases, reveals weakened interactions due to increased kinetic movement. General conclusion confirms that, 18-crown-6 ether with alkali metal ion complexation play an important role in regulating 18-crown-6 behaviours and provides valuable understanding into alkali metal ion-macrocyclic interactions in aqueous medium.