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Highly Luminescent, Neutral, Nine‐Coordinate Lanthanide(III) Complexes
Author(s) -
Kottas Gregg S.,
Mehlstäubl Marita,
Fröhlich Roland,
De Cola Luisa
Publication year - 2007
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200700514
Subject(s) - lanthanide , chemistry , luminescence , ligand (biochemistry) , coordination sphere , acetonitrile , excited state , photochemistry , inner sphere electron transfer , inorganic chemistry , crystallography , ion , crystal structure , organic chemistry , atomic physics , biochemistry , physics , receptor , optoelectronics
Using a simple ligand design, we have prepared neutral, nine‐coordinate lanthanide complexes that exclude water from the inner coordination sphere, thus leading to high emission quantum yields and long excited‐state lifetimes. The complexes form in high synthetic yields (49–87 %) by simply mixing the ligand and the lanthanide. Visible luminescence from Eu III ( Φ = 60 %, τ = 2.2 ms) and Tb III ( Φ = 7 %, τ = 0.2 ms) and near‐infrared luminescence from Yb III ( Φ = 0.7 %), Nd III and Er III were observed in acetonitrile and CH 2 Cl 2 at room temperature. In addition, the Gd III complex was prepared to gain information about the triplet state of the ligand. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)