CHARGE-TRANSFER FROM DONOR TO PHOTOEXCITED RU(BPY)(3)(2+) IN SOLUTIONAND POLYMER MATRIX

Electron transfer quenching of photoexcited Ru(bpy)(3)(2+) (bpy, bipyr idine) by three kinds of hole transport material, phenothiazine (PTZ) and 10-methylphenothiazine (MPTZ) was studied in acetonitrile solution and a polymer film. The quenching rate constants (k(q)) with respect to Delta G in acetonitrile solution are discussed in terms of Marcus t heory. In poly(ethyleneoxide) (PEG) films, quenching of photoexcited R u(bpy)(3)(2+) was observed and analysed by a static quenching model. T he electron transfer distance in the polymer film was found to be 1.1- 1.9 nm using a modified Perrin equation considering the excluded volum e effect. The dependence of the electron transfer rate on Delta G in t he PEO film was larger than that in acetonitrile solution.