Luminescence Probes: The Eu 3⊕ ‐ and Tb 3⊕ ‐Cryptates of Polypyridine Macrobicyclic Ligands | Zendy

Alpha Béatrice | Zendy; Balzani Vincenzo | Zendy; Lehn JeanMarie | Zendy; Perathoner Siglinda | Zendy; Sabbatini Nanda | Zendy

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Luminescence Probes: The Eu 3⊕ ‐ and Tb 3⊕ ‐Cryptates of Polypyridine Macrobicyclic Ligands

Author(s) -

Alpha Béatrice,

Balzani Vincenzo,

Lehn JeanMarie,

Perathoner Siglinda,

Sabbatini Nanda

Publication year - 1987

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.198712661

Subject(s) - luminescence , chemistry , molecule , aqueous solution , ion , absorption (acoustics) , ligand (biochemistry) , photochemistry , europium , metal , inorganic chemistry , materials science , organic chemistry , biochemistry , receptor , optoelectronics , composite material

A 10 4 ‐ to 10 5 ‐times more intense absorption than the corresponding aqua complexes is exhibited by the cryptates 1 and 2; in the latter the ligand absorbs, in the former the metal ion. From the luminescence‐lifetimes in H 2 O and D 2 O it can be deduced that in Eu aq 3⊕nine or ten H 2 O molecules coordinate the Eu 3⊕ ion, whereas in 1 only two or three H 2 O molecules coordinate. Even in 10 ‐5 molar aqueous solutions, 1 and 2 can absorb 1% of the incident UV photons and emit them again as visible light.

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