Visible and Near-Infrared Emission by Samarium(III)-Containing Ionic Liquid Mixtures
| Autor: | Peter Nockemann, Christiane Görller-Walrand, Kristof Van Hecke, Kris Driesen, Koen Binnemans, Luc Van Meervelt, Kyra Lunstroot |
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| Rok vydání: | 2009 |
| Předmět: |
Lanthanide
rare earths spectroscopy Inorganic chemistry Near-infrared spectroscopy chemistry.chemical_element Photochemistry Fluorescence ionic liquids Inorganic Chemistry Samarium chemistry.chemical_compound chemistry Ionic liquid luminescence lanthanides samarium Physical and Theoretical Chemistry Imide Spectroscopy Luminescence |
| Zdroj: | Inorganic Chemistry. 48:3018-3026 |
| ISSN: | 1520-510X 0020-1669 |
| DOI: | 10.1021/ic8020782 |
| Popis: | 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. ispartof: Inorganic Chemistry vol:48 issue:7 pages:3018-3026 ispartof: location:United States status: published |
| Databáze: | OpenAIRE |
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