Fluorescence quenching of perylene by Co2+ ions via energy transfer in viscous and non-viscous media
1990; Elsevier BV; Volume: 55; Issue: 1 Linguagem: Inglês
10.1016/1010-6030(90)80018-s
ISSN1873-2666
AutoresTunga Salthammer, H. Dreeskamp, David J. S. Birch, R. E. Imhof,
Tópico(s)Spectroscopy and Quantum Chemical Studies
ResumoNon-radiative energy transfer from singlet excited perylene to Co2+ ions has been studied in methanol, ethylene glycol and glycerol by time-correlated single-photon counting and steady state quenching experiments. In highly viscous glycerol the decay curves are represented by the expression given by Förster for long-range energy transfer. The experimental critical distance R0 = 13.2 Å is in good agreement with the theoretical value. In methanol and ethylene glycol the decay is modified owing to translational motion and can be described by the function exp(— at — bt12 with reasonable values for the reaction sphere and diffusion coefficients.
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