Structural and magnetic properties of mixed Co-Ln (Ln = Nd, Sm, Eu, Gd and Ho) diethyleneglycolate complexes

A. Abdallah, T. Gaudisson, R. Sibille, S. Nowak, W. Cheikhrouhou-Koubaa, K. Shinoda, M. François, S. Ammar

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

New hybrid compounds LnCoCl(deg)2 (deg = diethyleneglycolate; Ln = Nd, Sm, Eu, Gd and Ho) have been synthesized by mixing cobalt and rare earth cations in a boiling diethyleneglycol (degH2) medium. Their crystallographic structures have been ab initio solved from synchrotron powder diffraction data. They consist of edge sharing tetrameric sub-units [(Ln2Co2)(deg)4(Cl)2] forming 1D infinite chains along the c parameter of a monoclinic unit cell (SG = C2/c). The five- and seven-coordination of Co2+ and Ln3+ cations inferred from the crystallographic results is confirmed by UV-visible absorption and Extended X-ray Absorption Fine Structure (EXAFS) spectroscopy. In the LnCoCl(deg)2 (Ln = Nd, Sm, Eu, Gd, Ho) series, weak antiferromagnetic superexchange interactions have been evidenced, between high spin Co2+ and Ln3+ orbitally degenerate cations. These materials are considered as potential precursors for the simultaneous reduction of Co-Ln-glycolate species into bimetallic nanoparticles by the polyol process.

Original languageEnglish
Pages (from-to)16013-16023
Number of pages11
JournalDalton Transactions
Volume44
Issue number36
DOIs
Publication statusPublished - 2015 Aug 3

ASJC Scopus subject areas

  • Inorganic Chemistry

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    Abdallah, A., Gaudisson, T., Sibille, R., Nowak, S., Cheikhrouhou-Koubaa, W., Shinoda, K., François, M., & Ammar, S. (2015). Structural and magnetic properties of mixed Co-Ln (Ln = Nd, Sm, Eu, Gd and Ho) diethyleneglycolate complexes. Dalton Transactions, 44(36), 16013-16023. https://doi.org/10.1039/c5dt02346g