Peculiarities of molecular light scattering in a chlorobenzene—o-dichlorobenzene system and their relationship to the solution structure


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Abstract

The general coefficient of molecular light scattering (R0), degree of depolarization (ΔU), and refractive index (n) in a system of o-dichlorobenzene—chlorobenzene solutions were measured. The anisotropic (Ra) and isotropic (Ris) contributions to scattering and the iso-thermal compressibility and its excess component were calculated. A complicated nonmono-tonic behavior was found for the concentration dependences of the coefficients of molecular light scattering with a minimum in a range of low concentrations from the side of chlorobenz-ene and a maximum from the side of o-dichlorobenzene, indicating a substantial rearrange-ment of the structure of the solutions with a change in the concentration. An analysis of the concentration dependences of the coefficients of molecular light scattering, excess isother-mal compressibility, and excess molar volume revealed four ranges differed in structure: 0—0.03, 0.03—0.65, 0.65—0.9, and 0.9—1.0. The solution structure was described in each range.

About the authors

A. I. Abramovich

Department of Chemistry, M. V. Lomonosov Moscow State University

Author for correspondence.
Email: a-abramovich@yandex.ru
Russian Federation, Build. 3, 1 Leninskie Gory, Moscow, 119992

L. V. Lanshina

Department of Chemistry, M. V. Lomonosov Moscow State University

Email: a-abramovich@yandex.ru
Russian Federation, Build. 3, 1 Leninskie Gory, Moscow, 119992

I. D. Kargin

Department of Chemistry, M. V. Lomonosov Moscow State University

Email: a-abramovich@yandex.ru
Russian Federation, Build. 3, 1 Leninskie Gory, Moscow, 119992

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