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Title:Depolarized Light Scattering Studies of the Orientational Structure of Liquid Benzene, Dipole-Induced Dipole Models for Molecular Polarizabilities, and the Cotton-Mouton Effect
Author(s):Fujimoto, Bryant Shigeo
Department / Program:Chemistry
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):Chemistry, Physical
Abstract:The orientational relaxation time ((tau)(,LS)) is measured for liquid benzene by depolarized light scattering as a function of temperature and pressure. The values of (tau)(,LS) are compared with the orientational relaxation time as measured by raman scattering ((tau)(,SP)). The ratio (tau)(,LS)/(tau)(,SP) has no observable density dependence and increases slightly with increasing temperature. The dependence of (tau)(,LS) on the viscosity of the liquid is also examined and found to agree qualitatively with the Debye equation.
The use of empirical models for molecular polarizabilities is examined. In these models, each atom in a molecule is assigned a point polarizability. Each atom interacts with the other atoms in the molecule via dipole-induced dipole interactions. The effect of including internal fields in such a model is studied. The inclusion of internal fields does not significantly improve the ability of the model to predict molecular polarizabilities. The effect of allowing the atom point polarizabilities to be anisotropic is also studied. The results for the second model are better than for the first. However, the predictive ability of both models is limited. These models may only be useful for intermolecular interactions.
An experimental setup to measure the Cotton-Mouton effect is described. The limitations of this particular method and some results are presented.
Issue Date:1983
Description:106 p.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1983.
Other Identifier(s):(UMI)AAI8409926
Date Available in IDEALS:2014-12-15
Date Deposited:1983

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