Dy<sub>2</sub>@C<sub>79</sub>N: a new member of dimetalloazafullerenes with strong single molecular magnetism
Yuanyuan Wang, Jin Xiong, Jie Su, Ziqi Hu, Fang Ma, Rong Sun, Xueyou Tan, Hao‐Ling Sun, Bing‐Wu Wang, Zujin Shi, Song Gao
Abstract
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.