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- W2059635733 abstract "Three d–f dyads have been prepared, in which Ru(II) polypyridine-type chromophores are connected to a Ln(III) centre via the tetrapyridophenazine(tpphz) bridging ligand. The luminescent Ru(II) complex acts as a “ metallo ligand ”, allowing the formation of Ru(II)–Ln(III) heterodinuclear complexes by the addition of a Ln(tta) 3 unit at the second diimine site. The luminescent ruthenium tetrapyrido [3, 2- a :2′, 3″- c :3″, 2″- h :2‴, 3‴- j ] phenazine(tpphz) complex acts as a potential bridging ligand with a vacant diimine site, and is used as ‘metallo ligand’ to make heterodinuclear d–f complexes by attachment of a {Ln(dik) 3 } fragment (dik = tta (trifluoro theonyl acetone)) at the vacant site. When Ln = Nd, Yb or Er, the lanthanide centre has low-energy f–f excited states capable of accepting energy from the 3 MLCT excited state of the Ru(II) centre. Luminescence quenching of the 3 MLCT Ru(II) center affords sensitized Ln(III) based luminescence in the near-IR region. Nd(III) is found to be the most effective quencher for the 3 MLCT luminescence of the ruthenium component because of the high density of f–f excited states of the appropriate energy, which makes it a more efficient energy-acceptor compared to the Er and Yb complexes." @default.
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- W2059635733 date "2013-08-01" @default.
- W2059635733 modified "2023-10-18" @default.
- W2059635733 title "Sensitized near-infrared luminescence of lanthanide complexes by energy transfer from a ruthenium antenna" @default.
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- W2059635733 doi "https://doi.org/10.1016/j.poly.2013.05.018" @default.
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