We continue to work with uranium-based endohedral fullerenes and have identified several different families of compounds; some incorporate single uranium atoms encapsulated in different sized carbon cages, others incorporate two uranium atoms in variable sized cages and still other families contain odd numbers of carbons atoms, indicative of possible uranium carbides. Several of these new coompounds are being isolated and characterized and the most recent results will be presented.

We are also working with mixed metallic sulfides, including Dy as one of the encapsulated metals, and have managed to purify some of these. The most recent results at the time of the symposium will be presented and discussed.

Finally, functionalization of endohedral fullerenes continues to be a major component of our research efforts, mainly focused on bis-functionalization, and especially interested in the interplay between endohedral cluster nature and structure and exohedral derivatization. We are also exploring tris-functionalization and will present the most recent results at the symposium.