Observation of Excitons in a Molecular Liquid: Specular Reflection Spectrum of α -Methylnaphthalene

Authors

Craig J. Eckhardt, University of Nebraska - LincolnFollow
Leo F. Nichols, University of Nebraska - Lincoln

Date of this Version

October 1972

Comments

Published by Am Physical Soc. Phys. Rev. Lett. 29, 1221 - 1223 (1972). Copyright 1972. Permission to use. http://link.aps.org/abstract/PRL/v29/p1221.

Abstract

The normal-incidence specular-reflection spectrum of liquid α-methylnaphthalene was obtained for the wavelength region from 215 to 400 nm. Comparison of the Kramers-Kronig transform of the reflection spectrum with the absorption spectrum of α-methylnaphthalene is cyclohexane shows the bands of the neat-liquid spectrum shift to lower energy and display significant broadening. These effects support the existence of excitons in molecular liquids.