Largest 3d-4f 196-nuclear Gd_(158)Co_(38)clusters with excellent magnetic cooling

It is a meaningful and challenging work for structural and synthetic chemists to isolate nano-sized high-nuclearity cluster-molecules.In this work,two largest hetero-metallic nano-clusters Gd_(158)Co_(38) were obtained via the“multi-anions-template”method.Different from the reported giant hollow-nano-clusters,the Ln_(158) core in Gd_(158)Co_(38)(the protein-sized nano-clusters,ca.4.3 nm×3.6 nm×3.5 nm)has the highest Ln nuclear number,which is integrated by twelve halide ions(with the form of icosahedron)as key templates,while Co ions(as 3d metals)are located in its periphery.This emergence indicates a novel structure form of non-open Ln-containing high-nuclearity clusters,and affords a consummate pattern to analyse and assemble the complex cluster-molecules.In addition,Gd_(158)Co_(38)@Cl_(12)breaks the record magnetic entropy change of 3d-4f clusters with−∆S_(m)^(max)=46.95 J kg^(−1)K^(−1)at 7.0 T,2.0 K.