Synthesis, crystal structures, and photophysical properties of lanthanide complexes containing pyrrole-derivatized carboxylate ligands

Ga Lai Law, Ka Leung Wong, Kok Kin Lau, Hoi Lam Tam, Kok Wai Cheah, Wing Tak Wong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

26 Citations (Scopus)

Abstract

Two pyrrole-deriviatized carboxylic acids [L1 = 1-methylpyrrole-2-carboxylate] and [L2 = N-methyl-3-indoleglyoxylate] were used as ligands to prepare six lanthanide coordination compounds [(L 1)3Ln]n (Ln = Eu, 1; Gd, 2; Tb, 3) and [(L 2)n-Ln(NO3)(MeOH)2]n (Ln = Eu, 4; Gd, 5; Tb, 6). These complexes have been synthesized and structurally characterized by single-crystal X-ray diffraction. The phosphorescence behavior of the ligands in the Gd3+ complexes show that modification of the ligands can tune the triplet energy levels of the ligands so that they match the 5D0 energy level of Eu3+ and the 5D4 energy level of Tb3+; thus, the energy transfer efficiency from antenna to Eu3+ and Tb3+ is improved, and the Eu3+ and Tb3+ emission intensity is enhanced. This concept can be applied towards improving the luminescent properties of Ln3+ complexes by the modification of coordinating ligands. KGaA, 2007.
Original languageEnglish
Pages (from-to)5419-5425
Number of pages7
JournalEuropean Journal of Inorganic Chemistry
Issue number34
DOIs
Publication statusPublished - 18 Dec 2007
Externally publishedYes

Keywords

  • Europium
  • Lanthanide
  • Luminescence
  • Pyrrole
  • Terbium

ASJC Scopus subject areas

  • Inorganic Chemistry

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