Abstract
The process of singlet—singlet resonance energy transfer between rhodamine 6G (donor) and malachite green (acceptor) has been studied with a picosecond laser : streak camera system. Unlike previous investigations, the measurements were conducted in a low viscosity solvent (ethanol) at room temperature. The donor fluorescence decay function was found to be in agreement with that predicted by the Förster theory over a tenfold range of acceptor concentrations (10−3 M to 10−2 M) and up to a limiting time resolution of 10 ps. An average R0 value of 52.5 A was obtained from the fluorescence decay curves, in reasonable agreement with the value of 48 A calculated from spectroscopic data.
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