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- W2040761420 abstract "The quenching of the luminescence lifetime of cis-Ru(bpy) 2 (CN) 2 (bpy = 2,2′-bipyridine) by complexes of the cis- and trans-Cr(en) 2 (XY) + families (en = ethylenediamine; X and Y = F, Cl, Br, NCS, ONO) has been studied in aqueous solution and the results obtained have been discussed together with those previously reported for the quenching of the Ru(bpy) 3 2+ luminescene by the same Cr(III) complexes. Experimental results and theoretical considerations show that the quenching process occurs by exchange electronic energy transfer. Since in all cases the process is sufficiently exoergonic to make up for the small intrinsic barriers, the lowest diffusion values of the quenching constants indicate a non-adiabatic behavior. The degree of adiabaticity of the energy transfer process is larger for the neutral Ru(bpy) 2 (CN) 2 donor than for the positively charged Ru(bpy) 3 2+ donor. The X and Y ligands can be ordered in the following adiabaticity series: ONO − , F − < Cl − <NCS − <Br − . The geometry of the acceptor is a discriminating parameter only for energy transfer from the charged donor. These results show that the electronic term of exchange energy transfer in non-adiabatic processess is governed by a delicate balance of factors related to the composition and structure of the encounter complex [1]." @default.
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- W2040761420 date "1984-08-01" @default.
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- W2040761420 title "Non-adiabatic electronic energy transfer from the (3CTRu(bpy)2(CN)2 excited state to Cr(III) complexes" @default.
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- W2040761420 doi "https://doi.org/10.1016/s0020-1693(00)81836-8" @default.
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