Because of the extraordinary uses of liquid crystals (LCs), the liquid-crystalline phase has garnered considerable attention [1,2]. Colloidal dispersion containing anisometric compounds (colloidal rods and discs) also have a liquid-crystalline phase. [3]. In 1949, Onsagar [4,5] predicted theoretically the isotropic-nematic phase diagram on lyotropic liquid crystals (LLC) that consists of a solution of hard rods. Only a few works have been reported on the solution properties of liquid crystals. According to Jákli et al. [6], the isotropic-B7 phase transition temperature was dropped from 130°C to 70°C for just 15% of the solvent (p-xylene), and the ‘electro-optical switching’ domain was increased from 1-2°C to over 50°C. Jad?yn and co-workers [7] found the pretranslational critical-like behavior in the mixtures of thermotropic liquid crystal (7CB) with non-mesomorphic compounds (CCl₄ and 7CP). Chen and Nozaki [8] observed the 6CB microcrystal from the 6CB/ethanol matrix. We also observed the nematic phase [9] at high volume fraction of 5CB of the 5CB/benzene mixtures, which was correlated with the Onsagar’s theory. It is also possible to study the dynamics of such molecules at the molecular level. So, it turns out that the dispersion of LCs is of great significance not only for the practical applications but also for the basic physical research.

The goal of this research is to investigate the dynamics of a nematic liquid crystal (NLC) molecule in benzene, a nonpolar solvent. The phase transitions and relaxation mechanism of an NLC mixed with benzene were investigated using the broadband dielectric spectroscopic (BDS) approach.

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