Tuning the Redox Properties of Fullerene Clusters within a Metal-Organic Capsule.

Felix Rizzuto, Daniel M Wood, Tanya Ronson & Jonathan Nitschke
A porphyrin-edged metal-organic tetrahedron was shown to form host-guest complexes containing 1-4 equivalents of fullerene C60, depending on the solvent employed. The molecules of C60 were bound in anti-cooperative fashion within well-defined pockets; an X-ray crystal structure of three fullerenes inside the tet- rahedron was obtained. Electrochemical measurements revealed that the electron-accepting properties of the fullerenes inside the capsules were altered depending on the mode of encapsulation. En- capsulation of a greater number of fullerenes...

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