Resolved Absorption and Fluorescence Spectra of Two Tetrabenzoperylene Isomers inn-Alkane Matrices at Low Temperature. Evidences for Non-Planar Conformations

Abstract
Highly resolved Shpolskii absorption and fluorescence spectra of Tetrabenzo (a, cd, f, lm) and –(a, cd, j, lm)perylenes have been obtained in n-hexane and n-octane at 5 K. They have been interpreted in terms of the existence of several non-planar conformers in agreement with theoretical results obtained with the MM2 method.