Two Windmill-Shaped Ln 18 Nanoclusters Exhibiting High Magnetocaloric Effect and Luminescence.

The self-assembly of the high-nuclearity Ln-exclusive nanoclusters is challenging but of significance due to its aesthetically pleasing architectures and far-reaching latent applications in magnetic cooling technologies. Herein, two novel high-nuclearity lanthanide nanoclusters were successfully synthesized under solvothermal conditions, formulated as {[Gd(IN)(HCOO)(μ-O)(μ-OH)(HO)]·4HO} and {[Eu(IN)(HCOO)(CHCOO)(μ-O)(μ-OH)(HO)]·5HO} (abbreviated as and , HIN = isonicotinic acid). Both of them possess novel and exquisite windmill-shaped cationic cores in the family of high-nuclearity Ln-exclusive nanoclusters. Remarkably, the adjacent second building units are interconnected into a three-dimensional (3D) metal-organic framework by IN ligands. As expected, the abundant existence of Gd ions endows with a favorable magnetic entropy change at 2.0 K for Δ = 7.0 T (-Δ = 40.0 J kg K), and displays the typical luminescence of Eu ions.