Fluorescence Spectra of Anthracene and Naphthalene Excited by Giant-Pulse Ruby Laser

Abstract

The fluorescence spectra of anthracene and naphthalene in the visible region, when excited by a giant-pulse ruby laser, were recorded. The spectrum of anthracene consisted of four very broad bands extending from blue to violet. In the case of naphthalene, the spectrum consisted of comparably much sharper bands extending from blue to deep violet. Two-photon excitation from vibrationally excited levels of the ground electronic state is believed to be the process involved in producing the fluorescence in naphthalene.