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.

石墨烯，过渡金属二卤化物和其他二维（2D）材料的独特性能已引起人们对分层配位固体的兴趣。特别是，既可以充当导体又可以充当磁体的2D材料可以在量子磁电子学和自旋电子学中找到应用。在这里，我们报告了通过CrCl ₂与吡嗪（pyz）的反应合成的CrCl ₂（吡嗪）₂，一种空气稳定的层状固体。该化合物显示铁磁顺序下面〜 55 K，反射强磁性相互作用的存在。电导率测量表明，CrCl ₂（pyz）₂的电导率达到32 mS cm ^–1在室温下，通过基于2D跳跃的传输机制进行操作。这些性质是由吡嗪配体的氧化还原活性诱导的，这导致Cr 3 d和吡嗪π态的涂抹。我们建议氧化还原活性配体和还原性顺磁性金属离子的组合代表了一种可调谐2D材料的通用方法，该材料由电荷中性层组成，并具有长程磁序和高电子电导率。