Strahlungslose Energieübertragung von angeregten N-Heteroareniumkationen zu Rhodamin B. / Non-Radiative Energy Transfer from Excited N-Heteroarenium Cations to Rhodamin B.

Abstract

The systems acridizinium- and N-methylacridinium ion, respectively, as energy donors and rhodamin B (tetrafluoroborate) as energy acceptor show in solutions of low viscosity (solvent : methanol) energy transfer by resonance, in which a multi-step mechanism is participating. The experimental results of the detected singlet-singlet transfer are in good agreement with the predictable values of Förster's theory, if the spectroscopic parameters of the donor and the acceptor are corrected by assumption of their dependence upon concentration.