Synthesis and photophysical properties of ternary β-diketonate europium(III) complexes incorporating bipyridine and its derivatives

Idris Juma Al-Busaidi, Rashid Ilmi, Danyang Zhang, José D.L. Dutra, Willyan F. Oliveira, Nawal K. Al Rasbi, Liang Zhou, Wai Yeung Wong, Paul R. Raithby, Muhammad S. Khan*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Two new octa-coordinated ternary europium(III) complexes of the type [Eu(btfa)3(Br2-bpy)] (Eu-1) and [Eu(btfa)3(PhE2-bpy)] (Eu-2) (where btfa = 4,4,4-trifluoro-1-phenyl-1,3-butanedione, Br2-bpy = 5,5′-dibromo-2,2′-bipyridine, PhE2-bpy 5,5′-bis(phenylethynyl)-2,2′-bipyridine) together with a previously reported complex [Eu(btfa)3(bpy)] (Eu-3) have been synthesized. The complexes have been characterized by analytical and spectroscopic methods. The photophysical properties of the complexes have also been analyzed both experimentally and theoretically. The contribution of each ligand to the sensitized Eu(III) photoluminescence (PL) has been analyzed and is discussed. An energy transfer (ET) mechanism is proposed and discussed for the sensitized Eu(III) emission using experimental and theoretical data. The Eu(III) complex incorporating the parent bpy showed impressive performance as a double-emitting layer (EML) red organic light emitting diodes (R-OLEDs).

Original languageEnglish
Article number109879
JournalDyes and Pigments
Publication statusPublished - Jan 2022
Externally publishedYes


  • Energy transfer mechanism
  • Organic light emitting diodes
  • Photoluminescence
  • β-diketone

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Process Chemistry and Technology

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