Formation of the layered conductive magnet CrCl2(pyrazine)2 through redox-active coordination chemistry

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

  • Kasper S. Pedersen, Department of Integrated Structural Biology, IGBMC (Institute of Genetics and of Molecular and Cellular Biology), Centre National de la Recherche Scientifique (CNRS) UMR 7104/Institut National de la Santé de la Recherche Médicale (INSERM) U964/Université de Strasbourg, UMR 5031, Technical University of Denmark
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  • Panagiota Perlepe, Department of Integrated Structural Biology, IGBMC (Institute of Genetics and of Molecular and Cellular Biology), Centre National de la Recherche Scientifique (CNRS) UMR 7104/Institut National de la Santé de la Recherche Médicale (INSERM) U964/Université de Strasbourg, UMR 5031, UPR 9048
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  • Michael L. Aubrey, UC Berkeley
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  • Daniel N. Woodruff, Oxford University, Oxford, UK.
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  • Sebastian E. Reyes-Lillo, Lawrence Berkeley National Laboratory, UC Berkeley, Universidad Andres Bello
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  • Anders Reinholdt, Københavns Universitet
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  • Laura Voigt, Technical University of Denmark
  • ,
  • Zheshen Li
  • Kasper Borup
  • Mathieu Rouzières, Department of Integrated Structural Biology, IGBMC (Institute of Genetics and of Molecular and Cellular Biology), Centre National de la Recherche Scientifique (CNRS) UMR 7104/Institut National de la Santé de la Recherche Médicale (INSERM) U964/Université de Strasbourg, UMR 5031
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  • Dumitru Samohvalov, Department of Integrated Structural Biology, IGBMC (Institute of Genetics and of Molecular and Cellular Biology), Centre National de la Recherche Scientifique (CNRS) UMR 7104/Institut National de la Santé de la Recherche Médicale (INSERM) U964/Université de Strasbourg, UMR 5031, SARA Pharm Solutions
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  • Fabrice Wilhelm, ID27 Beamline, European Synchrotron Radiation Facility
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  • Andrei Rogalev, ID27 Beamline, European Synchrotron Radiation Facility
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  • Jeffrey B. Neaton, Lawrence Berkeley National Laboratory, UC Berkeley, Kavli Energy Nanosciences Institute at Berkeley
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  • Jeffrey R. Long, UC Berkeley, Lawrence Berkeley National Laboratory
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  • Rodolphe Clérac, Department of Integrated Structural Biology, IGBMC (Institute of Genetics and of Molecular and Cellular Biology), Centre National de la Recherche Scientifique (CNRS) UMR 7104/Institut National de la Santé de la Recherche Médicale (INSERM) U964/Université de Strasbourg, UMR 5031

The unique properties of graphene, transition-metal dichalcogenides and other two-dimensional (2D) materials have boosted interest in layered coordination solids. In particular, 2D materials that behave as both conductors and magnets could find applications in quantum magnetoelectronics and spintronics. Here, we report the synthesis of CrCl2(pyrazine)2, an air-stable layered solid, by reaction of CrCl2 with pyrazine (pyz). This compound displays a ferrimagnetic order below ∼55 K, reflecting the presence of strong magnetic interactions. Electrical conductivity measurements demonstrate that CrCl2(pyz)2 reaches a conductivity of 32 mS cm–1 at room temperature, which operates through a 2D hopping-based transport mechanism. These properties are induced by the redox-activity of the pyrazine ligand, which leads to a smearing of the Cr 3d and pyrazine π states. We suggest that the combination of redox-active ligands and reducing paramagnetic metal ions represents a general approach towards tuneable 2D materials that consist of charge-neutral layers and exhibit both long-range magnetic order and high electronic conductivity.

Original languageEnglish
JournalNature Chemistry
Volume10
Issue10
Pages (from-to)1056-1061
Number of pages6
ISSN1755-4330
DOIs
Publication statusPublished - 1 Oct 2018

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