Refractive indices of molecules in vapor and liquid

Calculations on benzene

Kristian O. Sylvester-Hvid, Kurt V. Mikkelsen, Mark A Ratner

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The refractive indices of benzene in the gas and liquid phase are computed employing a classical electrodynamical treatment of light propagation in continuous media and high level ab initio computations of the relevant molecular properties. We investigate various levels of complexity when deriving expressions relating the microscopic molecular optical properties and the refractive index. Different methods of accounting for the molecular environment within the framework of quantum chemical computations are scrutinized. The fundamental molecular property determining the refractivite index is the polarizability, and dynamic molecular polarizabilities of benzene are adequately computed using a triple-zeta plus double polarization basis; larger basis sets change the computed values by less than 1%. The effects of electronic correlation on the dynamic polarizabililties are discussed. For benzene vapor, computed results for the refractive index agree well with experiment. For liquid benzene, the best agreement with experiment is found using the Lorentz-Lorenz formula with computed gas-phase polarizability. We introduce the isolated molecule classical environment (IMLE) and the iterative self-consistent reaction field approach.

Original languageEnglish
Pages (from-to)8447-8457
Number of pages11
JournalJournal of Physical Chemistry A
Volume103
Issue number42
Publication statusPublished - Oct 21 1999

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Benzene
Refractive index
Vapors
benzene
vapors
refractivity
Molecules
molecular properties
Liquids
liquids
molecules
Gases
vapor phases
Light propagation
Molecular dynamics
liquid phases
Optical properties
Experiments
Polarization
molecular dynamics

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Refractive indices of molecules in vapor and liquid : Calculations on benzene. / Sylvester-Hvid, Kristian O.; Mikkelsen, Kurt V.; Ratner, Mark A.

In: Journal of Physical Chemistry A, Vol. 103, No. 42, 21.10.1999, p. 8447-8457.

Research output: Contribution to journalArticle

Sylvester-Hvid, Kristian O. ; Mikkelsen, Kurt V. ; Ratner, Mark A. / Refractive indices of molecules in vapor and liquid : Calculations on benzene. In: Journal of Physical Chemistry A. 1999 ; Vol. 103, No. 42. pp. 8447-8457.
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