Synthesis and crystal structures of mono-helical complexes of zinc(II) and europium(III) with 1,2-bis{[3-(2-pyridyl)pyrazol-1-yl]ethoxy}ethane

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

18 Scopus Citations
View graph of relations


  • Michael H. W. Lam
  • Derek Y. K. Lee
  • Sammi S. M. Chiu
  • K. W. Man
  • W. T. Wong


Original languageEnglish
Pages (from-to)1483-1488
Journal / PublicationEuropean Journal of Inorganic Chemistry
Issue number7
Publication statusPublished - 2000


A new multidentate ligand L, 1,2-bis{[3-(2-pyridyl)pyrazol-1- yl]ethoxy}ethane, has been synthesized by linking two 3-(pyridin-2- yl)pyrazoles with a 1,2-bis(ethoxy)ethyl spacer. Coordination of L with zinc(II) and europium(III) centres has led to mononuclear complexes of [Zn(L)](ClO4)2 (1) and [Eu(L)Cl2](ClO4) (2). X-ray crystal structures of both complexes have shown that L adopted a helical coordination geometry around both metal centres. The spectroscopic properties of both complexes have also been determined. In 1, photoluminescence was dominated by ligand centred 1(π-π*) fluorescence. In 2, ligand-to-metal energy transfer leading to 5D07Fn luminescence at the europium(III) centre was observed.

Research Area(s)

  • Europium, Helical structures, Ligand design, N ligands, Zinc

Citation Format(s)