“…isolating molecules at the nanoscopic scale, remains a great challenge nowadays, especially for clusters and metal-oxygen clusters. [1][2][3][4][5][6] In nanoelectronics and nanospintronics, the functional molecules, which play the role of a molecular electronic component, have to satisfy particular conditions: (i) to be isolated from each other, to preserve individual properties; [7][8][9][10] (ii) to be separated from the substrate which could potentially influence the physical properties of the functional molecule, even leading in some cases to the disappearance of the molecular property; [11][12][13][14][15][16] (iii) to be periodically organized on a substrate so that they could be addressed easily. Among oxo-clusters, polyoxometalates (POMs), made of early transition metals in their highest oxidation state (W VI , Mo VI , …), occupy an increasingly important place in the field of molecular electronics and spintronics, due to their remarkable redox, photoredox and magnetic properties.…”