Journal
INORGANIC CHEMISTRY
Volume 51, Issue 9, Pages 5050-5057Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ic202473b
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Funding
- National Natural Science Foundation of China [21072049, 21072050]
- Heilongjiang Province [2010td03]
- Heilongjiang University [2010hdtd-08, 2010hdtd-11]
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A new beta-diketone, 2-(2,2,2-trifluoroethyl)-1-indone (TFI), which contains a trifluorinated alkyl group and a rigid indone group, has been designed and employed for the synthesis of two series of new TFI lanthanide complexes with a general formula [Ln(TFI)(3)L] [Ln = Eu, L = (H2O)(2) (1), bpy (2), and phen (3); Ln = Sm, L = (H2O)(2) (4), bpy (5), and phen (6); bpy = 2,2'-bipyridine, phen = 1,10-phenanthroline]. X-ray crystallographic analysis reveals that complexes 1-6 are mononuclear, with the central Ln(3+) ion eight-coordinated by six oxygen atoms furnished by three TFI ligands and two O/N atoms from ancillary ligand(s). The room-temperature photoluminescence (PL) spectra of complexes 1-6 show strong characteristic emissions of the corresponding Eu3+ and Sm3+ ions, and the substitution of the solvent molecules by bidentate nitrogen ligands essentially enhances the luminescence quantum yields and lifetimes of the complexes.
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