Cr(pyrazine)2(OSO2CH3)2: A two-dimensional coordination polymer with an antiferromagnetic ground state

Research output: Contribution to journalJournal article – Annual report year: 2018Researchpeer-review

  • Author: Perlepe, Panagiota

    CNRS, France

  • Author: Oyarzabal, Itziar

    CNRS, France

  • Author: Pedersen, Kasper Steen

    Organic Chemistry, Department of Chemistry, Technical University of Denmark, Kemitorvet, 2800, Kgs. Lyngby, Denmark

  • Author: Negrier, Philippe

    CNRS, France

  • Author: Mondieig, Denise

    CNRS, France

  • Author: Rouzieres, Mathieu

    CNRS, France

  • Author: Hillard, Elizabeth A.

    CNRS, France

  • Author: Wilhelm, Fabrice

    ESRF-The European Synchrotron, France

  • Author: Rogalev, Andrei

    ESRF-The European Synchrotron, France

  • Author: Suturina, Elizaveta A.

    University of Southampton, United Kingdom

  • Author: Mathonière, Corine

    CNRS, France

  • Author: Clérac, Rodolphe

    CNRS, France

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A novel two-dimensional (2D) coordination polymer with the formula Cr(pyrazine)2(OSO2CH3)2 has been synthesized and characterized. Powder X-ray diffraction data reveal that this material, which crystalizes in the Pnnm orthorhombic space group, is composed of rectangular grid layers with octahedral CrN4O2 nodes bridged by pyrazine ligands. Since the redox-active pyrazine can be reduced in the presence of transition metals, X-ray absorption spectroscopy and quantum chemical calculations were used to confirm the +II oxidation state of the Cr center. Magnetic susceptibility measurements indicate the presence of antiferromagnetic interactions between the chromium(II) centers through the neutral pyrazine and suggest an antiferromagnetic ordered state below TN ≈ 10 K, which was confirmed by heat-capacity
measurements.
Original languageEnglish
JournalPolyhedron
Volume153
Pages (from-to)248-253
ISSN0277-5387
DOIs
Publication statusPublished - 2018
CitationsWeb of Science® Times Cited: No match on DOI

    Research areas

  • Coordination chemistry, Pyrazine, Chromium, Magnetic properties, X-ray spectroscopy

ID: 151915463