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- W2148779905 abstract "A ditopic ruthenium(II) tris(2,2′-bipyridyl)-based fullerene conjugate has been synthesized so as to separate the photoactive terminals by way of a short ethynylene spacer group that is expected to act as a rigid rod. Intramolecular triplet-energy transfer from the metal complex to the fullerene is quantitative at all temperatures and there is no indication for competing electron transfer. Temperature dependence studies indicate two pathways for triplet-energy transfer. An activationless route dominates at low temperature and is attributed to through-bond electron exchange that takes place via super-exchange interactions. The triplet energy of the bridging unit lies well above that of the metal complex. An activated process is switched-on at high temperatures and is believed to involve through-space electron exchange within closed conformations. Molecular dynamics simulations predict that, in addition to an extended conformation, the linker can distort in such a way that the terminals come into orbital contact. In fact, the resultant closed conformation possesses an idealised geometry for fast electron exchange." @default.
- W2148779905 created "2016-06-24" @default.
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- W2148779905 date "2006-01-01" @default.
- W2148779905 modified "2023-09-30" @default.
- W2148779905 title "Competing through-space and through-bond, intramolecular triplet-energy transfer in a supposedly rigid ruthenium(<scp>ii</scp>) tris(2,2′-bipyridine)–fullerene molecular dyad" @default.
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- W2148779905 doi "https://doi.org/10.1039/b609080j" @default.
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