Formation of the layered conductive magnet CrCl2(pyrazine)2 through redox-active coordination chemistry
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Archivos
Fecha
2018-10
Profesor/a Guía
Facultad/escuela
Idioma
en
Título de la revista
ISSN de la revista
Título del volumen
Editor
Nature Publishing Group
Nombre de Curso
Licencia CC
CC BY 4.0
Licencia CC
Resumen
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. © 2018, The Author(s).
Notas
Indexación Scopus
Palabras clave
Metal-Organic Frameworks, Coordination Polymer, Quantum Hall Effect
Citación
Nature Chemistry Volume 10, Issue 10, Pages 1056 - 10611 October 2018
DOI
10.1038/s41557-018-0107-7