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Crystal engineering with nanoobjects? Spherical structurally well‐defined molybdenum‐oxide‐based giant clusters can be appropriately functionalized to a crystalline material with the remarkable property of having discrete cluster units which get covalently linked to form chains (see picture) through Fe−O−Mo bonds after having approached each other as a result of the release of crystal water upon drying.

Containing nanowater droplets: A series of polyoxometalate capsules containing shells of water molecules is described. The surfaces of the capsules are covered with nanoscale pores, which when open permit entry to the cavities within (see structure, four of the 20 nanoscale pores are visible, and one of the six encapsulated Na+ ions is shown in violet). Variation of the cluster properties, such as charge and the nature of the internal surface, greatly influences the encapsulated species.

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