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Quenching of the triplet state of benzophenone by lanthanide 1,3-diketonate chelates in solutions

Löschung des Triplettzustandes von Benzophenon mittels Lanthanid-1,3-Diketonat-Chelatverbindungen in Lösung

  • Anorganische Und Physikalische Chemie
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Abstract

The phosphorescence of benzophenone in benzene and acetonitrile was quenched by several lanthanide (Sm, Eu, Gd, Tb and Dy) acetylacetonate chelates. The results ofStern-Volmer analysis including the quenching of benzophenone triplet and sensitization of lanthanide emission indicate that the quenching process occurs by the energy transfer mechanism via the excited triplet state of the ligand.

Zusammenfassung

Die Phosphoreszene von Benzophenon in Benzophenon in Benzen und Acetonitril wurde durch 1,3-Diketonat-Chelatverbindungen von einigen Lanthaniden (Sm, Eu, Gd, Tb und Dy) gelöscht. Die Resultate derStern-Volmer-Analyse einschließlich der Auslöschung des Benzophenon-Tripletts und die Sensibilisierung der Lanthanid-Emission zeigen, daß der Löschprozeß mittels Energieübertragungsmechanismus via angeregtem Triplettzustand des Liganden stattfindet.

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Authors and Affiliations

  1. Department of Chemical, A. Mickiewicz University, PL-60-780, Poznań, Poland

    Bronislaw Marciniak

  2. Department of Rare Earths, Faculty of Chemistry, A. Mickiewicz University, PL-60-780, Poznań, Poland

    Marian Elbanowski & Stefan Lis

Authors
  1. Bronislaw Marciniak
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  2. Marian Elbanowski
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  3. Stefan Lis
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Marciniak, B., Elbanowski, M. & Lis, S. Quenching of the triplet state of benzophenone by lanthanide 1,3-diketonate chelates in solutions. Monatsh Chem 119, 669–676 (1988). https://doi.org/10.1007/BF00809679

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  • DOI: https://doi.org/10.1007/BF00809679

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