Complex Dielectric Permittivity of Di-propyloxyazoxybenzene (3.OAOB) and Racemic Methylbutyl-phenyl-hexyloxybenzoate (CE6) on the Basis of the Nordio-Rigatti-Segre Theory

Abstract

Results of dielectric relaxation studies of two thermotropic liquid crystal substances, 3.OAOB and racemic CE6, are discussed on the basis of the Nordio-Rigatti-Segre theory.

Due to the anisotropy of the molecular structure, different contributions of the longitudinal and transversal components of the permanent dipole moment to the dielectric spectra can be observed.

Theoretical values for the dielectric increment of the four basic relaxation modes are calculated in two different ways and compared with the experimental results.

Key Words:

• dielectric properties
• liquid crystals
• dipole moments