Complex dielectric permittivity measurements in the frequency range 10MHz-20GHz have been carried out in diol-water mixtures over the entire concentration range using a time domain reflectometry (TDR) method at 25 0 C. A hydrogen bonded theory is applied to compute the dielectric constant for the mixtures. It adequately reproduces the experimental values of static dielectric constants for the diol-water mixtures. The dielectric parameters confirm that the intermolecular homogeneous and heterogeneous hydrogen bonding vary significantly with the increase in concentration of the constituents of the diol-water mixtures.
A time-domain reflectometry technique has been used to measure complex dielectric permittivity ε*(ω) = εʹ(ω) − jε″(ω) of 1-propanol-dioxane, 2-propanol-dioxane, aniline-dioxane, N-methylaniline-dioxane and N,N-dimethylaniline-dioxane mixtures in the frequency range of 10 MHz to 30 GHz. The complex permittivity spectrum has been fitted with a single relaxation time with a small amount of Davidson-Cole behaviour. The least squares fit method has been used to obtain the static dielectric constant (ε 0 ), relaxation time (τ), Bruggeman factor and Kirkwood correlation factor. The Luzar theoretical model is used to compute the binding energies and average number of hydrogen bond between co-solvent-co-solvent and co-solvent-dioxane molecules.
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