Dependence of the nematic-isotropic liquid transition temperature in low-polarity nematic liquid crystals on their molecular parameters

A model of occupied volume taking into account actual molecular configurations was proposed to establish the dependence of the phase transition temperatures and other physical properties of nematic mesogens on geometric parameters of their molecules. The proposed model explains the dependence of the transparency-point temperature of liquid crystals on the form-factor of the occupied (excluded) volume over a wide range of values of the considered characteristics. In terms of the proposed approach, the polarizabilities of the mesogenic molecules were calculated, and the relationship between the transparency-point temperature and the binding energy of the molecule was established.