Interpretation der Absorptionsspektren von Aza- und Azinium-substituierten Anthracenen / The Interpretation of Absorption Spectra of Aza- and Azinium-Substituted Anthracenes

Abstract

The absorption spectra of the 3 isomeric aza- and the 4 isomeric azinium-anthracenes are discussed on the basis of the absorption anisotropy, the oscillator strenght and the fluorescence decay times. The influence of endocyclic substitution depends on the position of the aza- and aziniumgroup, respectively. In the case of acridine, acridinium, benzo[g]quinolinium and benzo[f]- isoquinolinium the S0 → S2-transition is observable. The spectra of benzo[g]quinoline, benzo[f]- isoquinoline and acridizinium are similar to those of anthracene