Magnetism of cyano-bridged Ln3+-M3+ complexes. Part II: One-dimensional complexes (Ln3+ = Eu, Tb, Dy, Ho, Er, Tm; M 3+ = Fe or Co) with bpy as blocking ligand

Albert Figuerola, Joan Ribas, David Casanova, Miguel Maestro, Santiago Alvarez*, Carmen Diaz

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

90 Scopus citations

Abstract

The reaction of Ln(NO3)3(aq) with K 3[Fe(CN)6] or K3[Co(CN)6] and 2,2′-bipyridine in water/ethanol led to 13 one-dimensional complexes: trans-[M(CN)4(μ-CN)2Ln(H2O) 4(bpy)]n·4nH2O·1.5nbpy (Ln = Eu3+, Tb3+, Dy3+, Ho3+, Er 3+, Tm3+, Lu3+; M = Fe3+, Co 3+). The structures for [EuFe]n (1), [TbFe]n (2), [DyFe]n (3), [HoFe]n (4), [ErFe]n (5), [TmFe]n (6), [LuFe]n (7), [EuCo]n (8), [TbCo]n (9), [DyCo]n (10), [HoCo]n (11), [ErCo]n (12), and [TmCo]n (13) have been solved: they crystallize in the triclinic space group P1 and are isomorphous. They exhibit a supramolecular architecture created by the interplay of coordinative, hydrogen bonding, and π-π interactions. A stereochemical study of the eight-vertex polyhedra of the lanthanide ions, based on continuous shape measures, is presented. The Ln3+-Fe3+ interaction is antiferromagnetic in [DyFe]n and [TbFe]n. For [EuFe]n, [HoFe]n, [ErFe]n, and [TmFe]n, there is no sign of any significant interaction. The magnetic behavior of [DyFe]n suggests the onset of weak long-range ferromagnetic ordering at 2.5 K.

Original languageEnglish (US)
Pages (from-to)6949-6958
Number of pages10
JournalInorganic Chemistry
Volume44
Issue number20
DOIs
StatePublished - Oct 3 2005

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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