The challenge for atomic-level control of multi-aluminum structures for the development of new efficient materials

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Aluminum has attracted considerable attention because of their extreme versatility and unique range of properties, including acidity, hardness, and electroconductivity. In this study, various aluminum compounds possessing mono- and multi-aluminum sites were synthesized by using Keggin and Dawson-type lacunary polyoxometalates as inorganic ligands. For the oxidation of alcohols in water catalyzed by aluminum-coordinated polyoxotungstates with molecular oxygen, the activities were significantly affected by the structures around aluminum sites. Furthermore, a cationic organozirocnium fragment was successfully supported onto the aluminum site constructed in polyoxometalate; this is the first example of the polyoxoanion-supported organometallic compound by utilizing the aluminum site as an atomic-level support.