Wang Yuanyuan, Xiong Jin, Su Jie, Hu Ziqi, Ma Fang, Sun Rong, Tan Xueyou, Sun Hao-Ling, Wang Bing-Wu, Shi Zujin, Gao Song
Beijing National Laboratory for Molecular Science, State Key Lab of Rare Earth, Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peiking University, Beijing, 100871, P. R. China.
Department of Chemistry and Beijing Key Laboratory of Energy Conversion and Storage Materials, Beijing Normal University, Beijing 100875, P. R. China.
Nanoscale. 2020 May 28;12(20):11130-11135. doi: 10.1039/d0nr02519d.
Enhancing the exchange interaction between magnetic ions is a long-term target in molecular magnetism. Endohedral metallofullerenes (EMFs) provide a possibility for achieving such a goal by imprisoning multiple magnetic centers inside the confined inner space of a fullerene cage. Here, we report a new member of dimetallic azafullerene Dy2@C79N via crystallographic determination for the first time. Magnetic studies indicate that the strong ferromagnetic coupling between lanthanide ions and unpaired electrons enables Dy2@C79N to be a favorable SMM with large energy barrier of U = 669 K and observable hysteresis loops below 24 K.
增强磁性离子之间的交换相互作用是分子磁学的一个长期目标。内嵌金属富勒烯（EMFs）通过将多个磁性中心囚禁在富勒烯笼的受限内部空间中，为实现这一目标提供了一种可能性。在此，我们首次通过晶体学测定报道了双金属氮杂富勒烯Dy2@C79N的一个新成员。磁性研究表明，镧系离子与未成对电子之间的强铁磁耦合使Dy2@C79N成为一种有利的单分子磁体，其具有U = 669 K的大能量势垒，并且在24 K以下具有可观测的磁滞回线。
