Rare-earth complexes of ferrocene-containing ligands: Visible-light excitable luminescent materials

Y.F. Yuan, T. Cardinaels, K. Lunstroot, K. Van Hecke, L. Van Meervelt, C. Gorller-Walrand, K. Binnemans, Peter Nockemann

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Abstract

The ferrocene-derivatives bis(ferrocenyl-ethynyl)-1,10-phenanthroline (Fc(2)phen) and ferrocenoyltrifluoroacetone (Hfta) have been used to synthesize ferrocene-containing rare-earth beta-diketonate complexes. The complexes [Ln(tta)(3)(Fc(2)phen)] and [Ln(fta)(3)(phen)] (where Ln = La, Nd, Eu, Yb) show structural similarities to the tris(2-thenoyltrifluoroacetonate)(1,10-phenanthroline)lanthanide(III) complexes, [Ln(tta)(3)(phen)]. The coordination number of the lanthanide ion is 8, and the coordination sphere can be described as a distorted dodecahedron. However, the presence of the ferrocene moieties shifts the ligand absorption bands of the rare-earth complexes to longer wavelengths so that the complexes can be excited not only by ultraviolet radiation but also by visible light of wavelengths up to 420 nm. Red photoluminescence is observed for the europium(III) complexes and near-infrared photoluminescence for the neodymium(III) and ytterbium(III) complexes. The presence of the ferrocene groups makes the rare-earth complexes hydrophobic and well-soluble in apolar organic solvents.
Original languageEnglish
Pages (from-to)5302-5309
Number of pages8
JournalInorganic Chemistry
Volume46
Issue number13
DOIs
Publication statusPublished - 25 Jun 2007

ASJC Scopus subject areas

  • Inorganic Chemistry

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    Yuan, Y. F., Cardinaels, T., Lunstroot, K., Van Hecke, K., Van Meervelt, L., Gorller-Walrand, C., Binnemans, K., & Nockemann, P. (2007). Rare-earth complexes of ferrocene-containing ligands: Visible-light excitable luminescent materials. Inorganic Chemistry, 46(13), 5302-5309. https://doi.org/10.1021/ic070303v