Institut für Physikalische Chemie und Elektrochemie 1, Heinrich‐Heine‐Universit?t Düsseldorf, 40225 Düsseldorf (Germany), Fax: (+49)?211?8112179
Abstract:
Dark state: The photophysics of 9H‐2AP (see figure) depends strongly on the solvent and the temperature. In polar, aprotic solvents the fluorescence quantum yield is lower compared to protic ones. Analysis of the diffuse fluorescence spectra point to the existence of a dark singlet n,pi* state which is long‐lived (1 microsecond).
