1 State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China. tang@ciac.ac.cn.
Structurally unique double-shelled 4f and 3d-4f supramolecular grids were constructed and assembled into 3D hydrogen-bonded organic frameworks (HOFs), with the 3d-4f heterometallic HOF showing single-molecule magnet (SMM) behaviour.