Injecting electronic excitation energy into an artificial antenna system through an Ru2+ complex
Articolo
Data di Pubblicazione:
2004
Citazione:
Injecting electronic excitation energy into an artificial antenna system through an Ru2+ complex / O. Bossart, L. De Cola, S. Welter, G. Calzaferri. - In: CHEMISTRY-A EUROPEAN JOURNAL. - ISSN 0947-6539. - 10:22(2004), pp. 5771-5775. [10.1002/chem.200400743]
Abstract:
The Ru2+ complex [Ru-(bpy)2(bpy-ph 4-Si(CH3)3)]2+ can be electrostatically bound to the negatively charged channel entrances of dye-loaded zeolite L crystals where it acts as a functional stopcock molecule. Impressive electronic triplet-singlet excitation energy transfer from the Ru2+ complex to the acceptor dye oxazine 1 (Ox1) located inside the channels can be observed when the donor molecule is selectively excited. Time-resolved luminescence experiments have been performed on the separate components and on the assembled donor-acceptor material. The luminescence lifetime of the Ru2+ complex attached to the zeolite is reduced by a factor of 30 when Ox1 acceptor molecules are present. The fluorescence decay of Ox1 incorporated in zeolite L is single exponential with a lifetime of 3 ns. The much longer lifetime in zeolite L than in solution is due to the fact, that the diethyl groups are sterically restricted when the dye is inside the host.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
dyes/pigments; energy transfer; luminescence; ruthenium; supramolecular chemistry; zeolites
Elenco autori:
O. Bossart, L. De Cola, S. Welter, G. Calzaferri
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