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

Autor: Jeffrey R. Long, Andrei Rogalev, Sebastian E. Reyes-Lillo, Jeffrey B. Neaton, Laura Voigt, Mathieu Rouzières, Michael L. Aubrey, Kasper S. Pedersen, Rodolphe Clérac, Zhongshan Li, Fabrice Wilhelm, Panagiota S. Perlepe, Daniel N. Woodruff, Dumitru Samohvalov, Anders Reinholdt, Kasper A. Borup
Přispěvatelé: Technical University of Denmark [Lyngby] (DTU), Centre de Recherche Paul Pascal (CRPP), Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Department of Chemistry [Berkeley], University of California [Berkeley], University of California-University of California, Department of Chemistry, University of Oxford, Molecular Fondry [LBNL Berkeley], Lawrence Berkeley National Laboratory [Berkeley] (LBNL), Department of Physics [Berkeley], Departamento de Ciencias Fisicas, Universidad Andres Bello, Department of Chemistry [Copenhagen], Faculty of Science [Copenhagen], University of Copenhagen = Københavns Universitet (KU)-University of Copenhagen = Københavns Universitet (KU), Department of Chemistry, Technical University of Denmark, Lyngby, Centre for Storage Ring Facilities [Aarhus] (ISA), Aarhus University [Aarhus], Center for Materials Crystallography (CMC), Interdisciplinary Nanoscience Center (iNANO), European Synchrotron Radiation Facility (ESRF), University of California, Kavli Energy Nanosciences Institute at Berkeley, Department of Chemical & Biomolecular Engineering [Berkeley] (CBE), Materials Science Division [LBNL Berkeley], Departamento de Ciencias Fisicas [Santiago de Chile], Universidad Andrés Bello [Santiago] (UNAB)
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Zdroj: Nature Chemistry
Nature Chemistry, Nature Publishing Group, 2018, 10 (10), pp.1056-1061. ⟨10.1038/s41557-018-0107-7⟩
Pedersen, K S, Perlepe, P, Aubrey, M L, Woodruff, D N, Reyes-Lillo, S E, Reinholdt, A, Voigt, L, Li, Z, Borup, K, Rouzières, M, Samohvalov, D, Wilhelm, F, Rogalev, A, Neaton, J B, Long, J R & Clérac, R 2018, ' Formation of the layered conductive magnet CrCl 2 (pyrazine) 2 through redox-active coordination chemistry ', Nature Chemistry, vol. 10, no. 10, pp. 1056-1061 . https://doi.org/10.1038/s41557-018-0107-7
Nature chemistry, vol 10, iss 10
ISSN: 1755-4330
DOI: 10.1038/s41557-018-0107-7⟩
Popis: 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.
Databáze: OpenAIRE
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