Metaphor of molecular dynamics and dielectric dispersion of morpholine with aprotic solvents

ABSTRACT

The dielectric dispersion spectra of morpholine with methanol and ethanol binary mixtures have been studied by using Time Domain Reflectometry. Frequency dependent variations of specified mole fraction for the temperature 288 K, 293 K, 298 K, 303 K were determined. The complex permittivity spectra fitted by Debye model. The dielectric parameters of the associating liquids analysed and the ordering of molecules favours two relaxation sites and discussed on the basis of dielectric properties. The swapping bond of H at N–H favours intermolecular interaction. The intra-molecular exists between O and N within the ring. The excess properties of the mixture solutions has effective Kirkwood correlation factor that predicts molecular interaction and orientation among solute and solvents. The thermodynamic parameters ΔG, ΔH and ΔS of the solutions and dielectric loss factor of the mixed solvents bearing alcohols were determined. FTIR spectral assignments of solutions validate the molecular interaction and their shifts.

KEYWORDS:

• Dielectric relaxation
• molecular interaction
• excess permittivity
• correlation factor

Disclosure statement

No potential conflict of interest was reported by the authors.