Abstract
The orientational order parameters of naphthalene-d 8 dissolved in the nematic liquid crystal solvents EBBA, 1132, and a 55 wt% 1132/EBBA mixture have been measured as a function of temperature. The potential energy parameters, derived from the order parameters, have been analyzed as consisting of two anisotropic terms: a long-range contribution due to the interaction between the molecular quadrupole moment of the solute and the mean electric field gradient of the medium plus a short-range term which depends upon the size and shape of the solute molecule. The results are compared with calculated values based on van der Waals dimensions and with the earlier results on substituted benzenes
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