Molecular interactions and dielectric relaxation in the mixtures of amines with 2-fluorobenzoic acid in 1, 4-dioxane

Abstract

For the present study, the estimation of the static dielectric constants (Ɛ0), dielectric constant (Ɛ') at an angular frequency and dielectric loss (Ɛ') of methyl, ethyl and propyl amines with 2-fluorobenzoic acid in 1,4-dioxane were carried using Klystron microwave bench at frequency 9.43GHz. Using the dielectric parameters, the overall relaxation time (τ1) and group rotation relaxation time (τ2) of the polar solute molecules and average relaxation times (τ0) were also determined using Higasi and Gopalakrishna method employing Debye’s equations. The obtained results revealed that, out of five different molar ratios, relaxation time (τ) is maximum at 1:1 molar concentration for all the systems due to inter and intramolecular interactions through hydrogen bonding. In addition, the dipole moment, activation viscous flow (Δfη) and dielectric relaxation (Δfτ) due to molar free energy also been discussed.