The design and synthesis of well-defined polynuclear metal or metal–oxygen clusters have attracted much attention in many fields of science such as catalysis, magnetism, electrochemistry, and photochemistry.[1] Generally, well-defined polynuclear clusters have been synthesized by using structuredirecting agents such as oxygen-and/or nitrogen-donor organic ligands.[1] Polyoxometalates (POMs) are a large family of anionic metal–oxygen ...
