Dielectric studies of binary mixtures of 1-Propanol and Fluorobenzene

In the present paper, we report the results of dispersion study of binary mixtures of 1-Propanol (1-PrOH) and fluorobenzene (FB) over the entire concentration range (0.0, 0.1,...1.0 by volume) at 303 K. The Complex permittivity spectra of 1-Propanol (1-PrOH), Fluorobenzene (FB) and their binary mixtures are obtained in radio and microwave frequency range using Vector network analyzer (VNA) operating in the frequency range 0.3 MHz to 3.0 GHz and standard microwave benches operated at 9.1 GHz and 19.61 GHz. Static dielectric constant (epsilon(0)) and high frequency limiting dielectric constant (epsilon(x1)) for binary mixtures of 1-PrOH and FB are obtained by extrapolating smooth Debye type curves towards low frequency side and high frequency side on complex plane. For mole fraction range (X < 0.44 and X > 0.65) single dispersion and for the intermediate mole fraction range (0.44 >= X <= 0.65) double dispersion are observed. Optical dielectric constant (epsilon(infinity) = n(2)) for binary mixtures are measured using Abbe's refractometer. Excess static dielectric constant (epsilon(0))(E), Kirkwood correlation parameters (g, g(eff) and g(f)) and Bruggeman factor (f(B)) are determined from the values of static dielectric constant (epsilon(0)) and optical dielectric constant (epsilon(x)). Variations of these parameters have been discussed in terms of molecular interaction between the molecular species.