Polyoxometalates with Internal Cavities: Redox Activity, Basicity, and Cation Encapsulation in [X n + P 5 W 30 O 110 ] (15 - n ) - Preyssler Complexes, with X = Na + , Ca 2+ , Y
Highly Efficient Chirality Transfer from Diamines Encapsulated within a Self-Assembled Calixarene-Salen Host