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Luminescence Properties of Eu 3⊕ and Tb 3⊕ Complexes of Branched Macrocyclic Ligands Containing Four 2,2′‐Bipyridine Units
Author(s) -
Balzani Vincenzo,
van de Loosdrecht Jan,
Mecati Andrea,
Sabbatini Nanda,
Lehn JeanMarie,
Ziessel Raymond
Publication year - 1991
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199101901
Subject(s) - luminescence , lanthanide , ligand (biochemistry) , excited state , ion , aqueous solution , chemistry , bipyridine , molecule , metal , photochemistry , inorganic chemistry , crystallography , materials science , crystal structure , atomic physics , organic chemistry , physics , optoelectronics , biochemistry , receptor
Luminescence markers for biological application must have long luminescence lifetimes and high quantum yields in aqueous systems. Ligand 1 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.