Microwave dielectric relaxation study of 1-Hexanol with 1-propenol mixture by using time domain reflectometry at 300K

Abstract

Dielectric relaxation measurement of 1-Hexanol (1-HE), 1-Propenol (1-PR) & their complex have been carried out over the entire concentration range using time domain reflectometry technique at 300K in the frequency range of 10 KHz to 20-GHz. Bilinear calibration method is used to obtain complex permittivity ɛ*(ω) from complex reflection coefficient ρ*(ω) over the frequency range of 10 MHz to 20 GHz. The Excess inverse relaxation time (1/t)E, Kirkwood correlation factor (geff) and Bruggeman factor (fB) are also estimated to study the solute-solvent interaction. The value of dielectric constant increases & relaxation time decreases with increase in concentration 1-PR in 1-HE. Bruggeman plot shows a non - linearity of the curve for all concentration, indicate the hetero interaction which may be due to hydrogen bonding of the OH group of 1-PR with 1-HE.