✦ LIBER ✦

Luminescence properties of cryptate europium (III) complexes incorporating heterocyclic N-oxide groups

✍ Scribed by Luca Prodi; Mauro Maestri; Vicenzo Balzani; Jean-Marie Lehn; Christine Roth

Publisher: Elsevier Science
Year: 1991
Tongue: English
Weight: 485 KB
Volume: 180
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(91)87114-q

No coin nor oath required. For personal study only.

✦ Synopsis

The luminescence spectra, lifetimes, and quantum yields of the cryptate-type complexes [Eu c 1 I'+ and [Eu L 213*, where 1 and 2 are cryptand-type ligands containing two 2,2'-bipyridine (bpy) and one 2,2'-bipyridine-I,1 '-dioxide (bpy0,) units (1) or two bpy and one 3,3'-biisoquinoline-2,2'-dioxide (biq02) units (2), have been measured in H,Oand D,O at 77 and 300 K. The luminescence quantum yield upon excitation in the @and-centered bands is much higher than that exhibited by the previously investigated [ Eu c bpy.bpy.bpy I'+ cryptate. The role played by various radiative and non-radiative paths is discussed.

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