Metal-ligand-based capsules

Professor Raymond s team has successfully developed a number of capsules since 1994, but one system, based on a bis(catechol)dinap-thalene ligand and trivalent metal ions such as iron(III) or gallium(III), has been the most interesting. The symmetry of the organic ligand (twofold) with the preferred symmetry of the metal ions (threefold) drives the combination of the two (ligand and metal) to form a molecular capsule with the shape and symmetry of a tetrahedron... 

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