Rotationally Resolved Spectroscopy of Tetracene and its Van Der Waals Complexes With Inert Gas Atoms

Abstract

Rovibronic spectra of tetracene (C₁₈H₁₂) and its Van der Waals complexes with argon and krypton have been resolved by using a well collimated molecular beam in combination with a single frequency dye laser. The rotational constants of tetracene have been deduced in the S₀ and S₁ electronic state. The rovibronic spectra of the Van der Waals complexes show an enhanced intersystem crossing.