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Electric Polarization of Onsager Fluids. II. Birefringence. 1. Kerr Constants of Pure Substances

100%
Prezhdo V., Tarasova G., Prezhdo O., Tyurin S., Akulova O., Kurskaya T.
Acta Physica Polonica A
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1994
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vol. 85
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issue 5
797-804
EN
The Kerr constants of pure liquid organic compounds, which exhibit weak intermolecular interactions and possess widely varying electric, optical and polarizational molecular parameters, were computed from the data on dielectrometry and electric birefringence. Good agreement of the calculated and observed values was reached as the result of the introduction of the local field model, which develops the concepts of reactive field and local electric induction of a polarized fluid, into the orientational theory of the Kerr effect.
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Electric Polarization of Onsager Fluids. I. Dipole Polarization. 1. Electric Moments of Free Molecules

100%
Prezhdo V., Tarasova G., Prezhdo O., Tyurin S., Akulova O., Kurskaya T.
Acta Physica Polonica A
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1993
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vol. 84
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issue 2
253-258
EN
An attempt was made to modify the model Onsager theory. A polarizable molecular dipole enclosed in a spherical cavity is substituted for a rigid one submerged in the polarizable medium which fills the cavity. The local dielectric permittivity of the Heaviside type is replaced for the oscillating, rapidly damping function of the Fresnel integral. The analytical expressions deduced allow to estimate dipoles of free molecules, starting from the results of dielectrometry of polar fluids. The obtained values are as close as possible to the experimental data on a great variety of pure organic liquids.
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Electric Polarization of Onsager Fluids. 1. Dipole Polarization. 2. Binary Solutions of Organic Compounds

100%
Prezhdo V., Tyurin S., Prezhdo O., Tarasova G., Akulova O., Kurskaya T.
Acta Physica Polonica A
|
1994
|
vol. 85
|
issue 3
509-515
EN
Set forth in the previous report [1], the continual theory of dipole polarization of molecular fluids, which suggests substitution of the rigid Onsager sphere for the polarizable body and takes into consideration electric induction of this body and its nearest surroundings, is extended in this paper to binary solutions with diverse polarities. Dipole moments of free molecules of dissolved substances were calculated from experimental data of dielectrometry of a large number of extremely diluted organic substances and are close to the corresponding gaseous phase values. On the ground of solution polarization measurements the criterion of physical consistency of various models of the condensed medium internal field is proposed.
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