Relaxationsprozesse in optisch angeregten EDA-Komplexen des TCNE

Relaxation Processes in Optically Excited EDA Complexes of TCNE The quenching of fluorescence of aromatic π-donors by TCNE served as an qualitative criterion for the participation of excited states of EDA complexes in deactivation processes in solution. Due to the energetic situation of the states taking part in deactivation the quenching process in the chosen TCNE-donor complexes is controlled by diffusion. In unpolar solvents and in the presence of oxygen phosphorescence of donors and ionic dissociation of EDA complexes was not be observed. While at 25°C the deactivation of the EDA excited states occurs mainly radiationless, the appropriate CT fluorescence emissions at – 196°C are evident.