Adducts of lanthanide β-diketonates with 2,4,6-tri(2-pyridyl)-1,3,5-triazine: Synthesis, structural characterization, and photoluminescence studies

Channa R. De Silva, Jenine R. Maeyer, Alice Dawson, Zhiping Zheng

Research output: Contribution to journalArticle

48 Scopus citations

Abstract

Adducts of lanthanide β-diketonates of the general formula LnL3(TPTZ) were synthesized and structurally characterized by single crystal X-ray diffraction [Ln = Eu3+, Tb3+, Er3+; L is the conjugate base of dibenzoylmethane (DBM), 1-benzoylacetone (BA), thenoyltrifluoroacetone (TTA), or 4,4,4-trifluoro-1-phenyl-1,3-butanedione (BTFA); TPTZ = 2,4,6-tri(2-pyridyl)-1,3,5-triazine, a rigid Lewis base with a large π system]. The lanthanide ion in each of these complexes is nonacoordinate with six β-diketonate oxygen atoms and three TPTZ nitrogen atoms, forming a coordination polyhedron best describable as a monocapped square antiprism. Characteristic red, green, and near infrared luminescence was observed for the Eu3+, Tb3+, and Er3+ complexes, respectively. All complexes showed significantly enhanced luminescence quantum yields when compared with the corresponding aqua analogues, with one of the Eu3+ complexes displaying a quantum yield of 69.7% in chloroform.

Original languageEnglish (US)
Pages (from-to)1229-1238
Number of pages10
JournalPolyhedron
Volume26
Issue number6
DOIs
StatePublished - Apr 11 2007

Keywords

  • 2,4,6-Tri(2-pyridyl)-1,3,5-triazine
  • Lanthanide complexes
  • Photoluminescence
  • Synthesis
  • X-ray crystallography

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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