Abstract

The luminescence (fluorescence) decay profiles of ruthenous tris(2,2′-bipyridine) and pyrenetetrasulfonate in the presence of ferricyanide solubilized in cyclohexane-pentanol-sodium dodecylsulfate quaternary water-in-oil microemulsions have been analyzed with a percolation model applicable to reactions in restricted geometries. The reaction rate is time-dependent and it is given by K( t)= fC 1 t f−1 −2 fC 2 t 2 f−1 where C 1 and C 2 are constants. f<1 and it is related with the dimensionality of the reaction. The importance of the term containing C 2 is discussed. The evolution of K with time, nature of the probe, quencher concentration, droplet concentration and temperature is discussed.

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