Structure of triaquatris(1,1,1-trifluoro-4-oxo-pentan-2-olato)cerium(III) as a possible fluorescent compound

Atsuya Koizumi, Takuya Hasegawa, Atsushi Itadani, Kenji Toda, Taoyun Zhu, Mineo Sato

Research output: Contribution to journalArticle

Abstract

Luminescence due to the d-f transition of Ce3+ is quite rare in metal-organic complexes where concentrate quenching frequently occurs. One of the possible ways to avoid this is to design an architecture with elongated metal-metal distances. In the structure of the title complex, triaquatris(1,1,1-trifluoro-4-oxopentan-2-olato-2O,O0)cerium(III), [Ce(C5H4F3O2)3(H2O)3], the CeIII complex is linked to neighbouring ones by hydrogen bonding. Within the complex, the CeIII atom is coordinated by nine O atoms from three 1,1,1-trifluoro-4-oxopentan-2-olate (tfa) anions as bidentate ligands and three water molecules as monodentate ligands. Thus, the coordination number of CeIII atom is nine in a monocapped square-antiprismatic polyhedron. The F atoms of all three independent CF3 groups in tfa are disordered over two positions with occupancy ratios of about 0.8:0.2. The intermolecular hydrogen bonds between the ligands involve tfa-water interactions along the [110] and [110] directions, generating an overall two-dimensional layered network structure. The presence of the F atoms in the tfa anion is responsible for an increased intermolecular metal-metal distance compared to that in the analogous acetylacetonate (acac) derivatives. Fluorescence from Ce3+ is, however, not observed.

Original languageEnglish
Pages (from-to)229-232
Number of pages4
JournalActa Crystallographica Section E: Crystallographic Communications
Volume74
DOIs
Publication statusPublished - 2018 Feb
Externally publishedYes

Keywords

  • 1
  • 1
  • 1-trifluoro-acetylacetone
  • Cerium complex
  • Crystal structure
  • Fluorescence

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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