Dielectric inertial

Gross E. P. Inertial effects and dielectric relaxation, J. Chem. Phys. 23, 1415-23 (1955). 

The basic outline of the heterogeneous dielectric media method is to divide the total system into two subsystems. The solvated molecule is encapsulated in a cavity C which is given by the surfaces and 2 . The cavity is surrounded by a heterogeneous environment given by two part Sm and St. The two dielectric media are in contact with the cavity through the surfaces Xm and 2,. Each of the two dielectric media is taken to be a linear, homogeneous and isotropic dielectric medium and is characterized by a scalar, optical, inertial or static dielectric constant. As an illustration, we consider two dielectric media, Sm and Sh characterized by the dielectric constants em and eh respectively, with the following spatial positions ... 

It is to be emphasized that the simple Pekar factor [40] (the dielectric prefactor in Equation (3.88) appears only when the image effects are absent (e.g., as in the case of a point charge at the center of a spherical cavity) or suppressed. In this limiting case, D may be taken as the solute vacuum field. On the other hand, both Equation (3.88) and (3.89) manifest the same assumption of additivity, whereby the nonequilibrium inertial free energy reflected in As is cast as the difference between two equilibrium solvation free energies (Gs) i.e., the optical (sx term) and the total (e0 term) solvation free energies... 

---