Solid phase chemistry can be used to prepare, in excellent
yield and purity, a range of Fréchet-type aryl-ether dendrimers, for
use in either dendrimer conjugation studies, resin loading enhancement or
the wedge based synthesis of larger dendrimers.
While no films could be obtained from compound 19 with no polar head group, all the corresponding amphiphilic fullerene bis-adducts showed good spreading characteristics and reversible behavior upon successive compression/expansion cycles. The encapsulation of the fullerene in a cyclic addend surrounded by four long alkyl chains is, therefore, an efficient strategy to prevent the irreversible aggregation