Synthesis, crystal structures and magnetism of a series of heptanuclear rare-earth-centered trigonal prism clusters

Qin De Liu, Jun Ran Li*, Song Gao, Bao Qing Ma, Hui Zhong Kou, Liang Ouyang, Rui Li Huang, Xi Xiang Zhang, Kai Bei Yu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

37 Scopus citations

Abstract

A series of heptanuclear rare-earth-centered trigonal prism clusters [LnCu6(μ-OH)3(HL)2(L)4] ·(ClO4)2·25H2O (Ln = La-Ho and Y; H2L = iminodiacetic acid) was synthesized and their crystal structures were determined by X-ray diffraction. The rare-earth center and the copper ions are bridged by three μ3-OH and six μ2-O moieties from the carboxyl groups of six different ligands. The rare earth ion is nine-coordinate and the coordination polyhedron is an unusual, highly symmetrical tricapped trigonal prism (C3h). The cluster has an interesting, highly symmetrical eclipsed structure (C3h) which utilizes the central rare earth cation as a template. The temperature-dependence of the magnetic susceptibility of the cluster series was investigated and was found to vary with the central rare-earth ions. The magnitude of the antiferromagnetic interaction constants J between Cu2+ ions in [LaCu6] and [YCu6] were compared and estimated to be -24 cm-1 and -7 cm-1, respectively, indicating a significant effect of the central diamagnetic ions.

Original languageEnglish (US)
Pages (from-to)731-736
Number of pages6
JournalEuropean Journal of Inorganic Chemistry
Issue number4
StatePublished - Feb 2003
Externally publishedYes

Keywords

  • Copper
  • Lanthanides
  • Magnetic properties
  • N ligands
  • O ligands
  • Template synthesis

ASJC Scopus subject areas

  • Inorganic Chemistry

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