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- W2012381360 abstract "Abstract We report three new systems containing tris(bipyrazine)rutheniumII attached to bis(bipyridine)chlororutheniumII/III and/or pentacyanoferrateII/III complexes via the bipyrazine (bpz) bridging ligand, i.e. [Ru(bpz)3Ru(bipy)2Cl]3+/4+, [Ru(bpz)3Fe(CN)5]−/0 and [(CN)5FeIII(bpz)RuII(bpz)2RuII(bipy)2Cl]+, (bipy: 2,2′-bipyridine). The excitation at 440 nm of the [RuII(bpz)3RuII(bipy)2Cl]3+ complex leads to a 1 MLCT state which undergoes efficient intersystem crossing to the corresponding 3 MLCT state, [RuIII(bpz−)3RuII(bipy)2Cl]3+. The conversion to the inverted mixed valence state, [RuII(bpz−)3RuIII(bipy)2Cl]3+, proceeds via electron transfer mechanisms, competing with the radiative and nonradiative decay of the 3 MLCT state. A similar behavior was observed for the [RuII(bpz)3FeII(CN)5]− complex. In the case of the [(CN)5FeIII(bpz)RuII(bpz)2RuII(bipy)2Cl]− triad, the excited state centered on the [Ru(bpz)3]2+ moiety can undergo intramolecular electron transfer with the peripheral RuII and FeIII groups, promoting effective charge-separation in the inverted mixed valence complex, [(CN)5FeII(bpz)RuII(bpz)2RuIII(bipy)2Cl]+." @default.
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- W2012381360 date "2002-08-01" @default.
- W2012381360 modified "2023-09-28" @default.
- W2012381360 title "Photophysical behavior of molecular dyads and triad comprising tris(bipyrazine)rutheniumII, bis(bipyridine)chlororutheniumII and pentacyanoferrateII complexes" @default.
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