Abstract
Abstract Rate constants for quenching emission from photoexcited tris-(2,2′-bipyridine)- and tris(1,10-phenanthroline)Ru(II) complexes by bipyridinium ion vary with the redox potential of the quencher. Annihilation of the geminate ion pairs at the quenching step can be reduced by the addition of EDTA. The effect of EDTA increases with the concentration but quickly reaches asymptotic values as expected in the presence of an extremely fast geminate recombination of ion pairs in a cage.
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