Zhang Di, Gao Bo, Ouyang Yuqi, Xu Song, Tian Qingyong, Wu Wenzhuo, Xu Qun
College of Materials Science and Engineering, Zhengzhou University Zhengzhou 450052 P.R. China
Henan Institute of Advanced Technology, Zhengzhou University Zhengzhou 450052 P.R. China
Chem Sci. 2024 Aug 30;15(38):15804-10. doi: 10.1039/d4sc03778b.
Room-temperature ferromagnetism in graphene has attracted considerable attention due to its potential application as spintronics. Theoretically, magnetic moment of graphene can be generated by removing a single p orbital from the π system, which introduces an unpaired electron into the graphene motif for magnetic coupling. In this work, p orbital of graphene is experimentally removed by cleaving the π bond of graphene using HBO with the assistance of supercritical CO (SC CO), which simultaneously introduces -B(OH) groups and unpaired electrons. As a result, ferromagnetic coupling between unpaired electrons substantially enhances the magnetic properties of the 2D graphene motif, leading to room-temperature ferromagnetism. Overall, unpaired electrons were introduced into a 2D graphene motif through π bond cleavage, which provides a novel approach for magnetic manipulation of 2D materials with conjugated structures.
石墨烯中的室温铁磁性因其在自旋电子学方面的潜在应用而备受关注。从理论上讲，石墨烯的磁矩可以通过从π系统中移除单个p轨道来产生，这会将一个未配对电子引入石墨烯结构中以进行磁耦合。在这项工作中，通过在超临界CO（SC CO）的辅助下使用HBO裂解石墨烯的π键，实验性地移除了石墨烯的p轨道，这同时引入了 -B(OH) 基团和未配对电子。结果，未配对电子之间的铁磁耦合大大增强了二维石墨烯结构的磁性，导致室温铁磁性。总体而言，通过π键裂解将未配对电子引入二维石墨烯结构中，这为具有共轭结构的二维材料的磁操控提供了一种新方法。
