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The Soft Material Obtained from an Europium (III)-Containing Ionic Liquid

  • Shao, Huifang (School of Chemical Engineering and Technology, Hebei University of Technology) ;
  • Wang, Yige (School of Chemical Engineering and Technology, Hebei University of Technology) ;
  • Li, Dan (School of Chemical Engineering and Technology, Hebei University of Technology)
  • Received : 2010.12.23
  • Accepted : 2011.01.19
  • Published : 2011.03.20

Abstract

The addition of organic ligand (${\beta}$-diketone or heterocyclic compound) to the europium (III)-containing ionic liquid resulted in bright luminescent soft materials with the molar ratio of europium/ionic liquid (IL)/ligand being 1:3:1 that exhibit bright red light under UV lamp. The luminescent properties such as emission features and lifetime of $^5D_0$ $Eu^{3+}$ excited level are dependent on the organic ligands. The materials were characterized by FT-IR and luminescence spectroscopy. The data shows that at least parts of the ILs (carboxylic acid) are replaced with ${\beta}$-diketone ligand rather than the formation of europium complex with the molar ratio of $Eu^{3+}$:IL: ligand being 1:3:1, while no ILs could be replaced by the heterocyclic ligand such as Bpy and Phen.

Keywords

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