Solvation Effects on Polarizability of Aromatic Fluids.

Area of Science:

• Physical Chemistry
• Materials Science
• Computational Chemistry

Background:

• Understanding solvation effects on molecular polarizability is crucial for describing optical and dielectric properties of materials.
• High-refractive-index molecular materials require accurate polarizability models in condensed phases.

Purpose of the Study:

• To elucidate solvation effects on polarizability in condensed phases using a combined electronic, solvation, and vibrational polarizability model.
• To apply the model to liquid precursors like benzene, naphthalene, and phenanthrene and compare with experimental data.

Main Methods:

• A polarizability model incorporating electronic, solvation, and vibrational contributions was employed.
• The model was applied to liquid benzene, naphthalene, and phenanthrene.
• Calculated refractive indices were compared with experimental values.

Main Results:

• Solvation and vibrational contributions were found to be of opposite signs, nearly canceling for benzene.
• A 2.5% and 5.0% decrease in polarizability was predicted for naphthalene and phenanthrene, respectively, relative to monomer values.
• The increase in electronic polarizability significantly influenced interaction polarizability, highlighting the importance of solvation effects.

Conclusions:

• The polarizability model accurately predicts refractive indices for benzene, naphthalene, and phenanthrene.
• Solvation effects play a critical role in determining the overall polarizability and optical properties of these molecular materials.