Etude des premières bandes d'absorption S0→S1 et S0→S2 du 5-méthoxyindole

Abstract

The experimental and theoretical results obtained for 5-methoxyindole (5MOI) indicate a large energetic difference between the S₀ → S₁ and S₀ → S₂ transitions indicating a charge distribution very different from that of indole. A weak shoulder on the long wavelength side of the S₀ → S₁ band is attributed to a nπ* transition associated with the methoxy substituent. This feature has previously been attributed to a hot band. The effect of solvent on the molecule and the results obtained by the quantitative quantum CNDO/2 and CNDO/M methods are discussed.