Lumineszenzeigenschaften von Eu3⊕- und Tb3⊕- Komplexen verzweigter makrocyclischer Liganden mit vier 2,2′-Bipyridineinheiten†

Luminescence markers for biological application must have long luminescence lifetimes and high quantum yields in aqueous systems. Ligand forms complexes with Eu 3○+ , which fulfill these criteria. The lanthanide ion is encapsulated by the macrocycle and the two additional mobile arms. The efficiency of the energy transfer from ligand to metal ion is thereby optimized, and water molecules cannot deactivate the excited state of the metal ion

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