Title: Visible and Near-Infrared Emission by Samarium(III)-Containing Ionic Liquid Mixtures
Authors: Lunstroot, Kyra
Nockemann, Peter
Van Hecke, Kristof
Van Meervelt, Luc
Görller-Walrand, Christiane
Binnemans, Koen ×
Driesen, Kris #
Issue Date: Apr-2009
Publisher: American Chemical Society
Series Title: Inorganic Chemistry vol:48 issue:7 pages:3018-3026
Abstract: Highly luminescent anionic samarium(III) β-diketonate and dipicolinate complexes were dissolved in the imidazolium ionic liquid 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, [C6mim][Tf2N]. The solubility of the complexes in the ionic liquid was ensured by a careful choice of the countercation of the samarium(III) complex. The samarium(III) complexes that were considered are [C6mim][Sm(tta)4], where tta is 2-thenoyltrifluoroacetonate; [C6mim][Sm(nta)4], where nta is 2-naphthoyltrifluoroacetonate; [C6mim][Sm(hfa)4], where hfa is hexafluoroacetylacetonate; and [choline]3[Sm(dpa)3], where dpa is pyridine-2,6-dicarboxylate (dipicolinate) and [choline]+ is (2-hydroxyethyl)trimethyl ammonium. The crystal structures of the tetrakis samarium(III) β-diketonate complexes revealed a distorted square antiprismatic coordination for the samarium(III) ion in all three cases. Luminescence spectra were recorded for the samarium(III) complexes dissolved in the imidazolium ionic liquid as well as in a conventional solvent, that is, acetonitrile or water for the β-diketonate and dipicolinate complexes, respectively. These experiments demonstrate that [C6mim][Tf2N] is a suitable spectroscopic solvent for studying samarium(III) luminescence. High-luminescence quantum yields were observed for the samarium(III) β-diketonate complexes in solution.
ISSN: 0020-1669
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Design and Synthesis
Chemistry - miscellaneous
Biochemistry, Molecular and Structural Biology Section
× corresponding author
# (joint) last author

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