Photochemical Formation of Tire-Shaped Molybdenum Blues: Topology of a Defect Anion, [Mo142O432H28(H2O)58]12−

Big blue-walled tires: A diamagnetic blue 28-electron reduced species [MoMoO432H28(H2 O)58]12− ({Mo142}) was produced photochemically by the degradative self-assembly of [Mo36O112(H2O)16]8− ({Mo36}). The molybdenum blue photochemistry is not only suitable for the investigation of the mechanism of degradation self-assembly processes but also provides a basis for the molecular design of nanosized ring clusters.