Sequential click modification of a lithium-ion endohedral fullerene connecting small molecules through a dieneazide linker.

A versatile method for the chemical modification of a lithium-ion endohedral fullerene (Li + @C 60 ) to connect various small molecules is described. The designed dieneazide linker enables the facile connection of Li + @C 60 with small molecules bearing a terminal alkyne via Huisgen annulation and a subsequent Diels-Alder reaction. This strategy significantly expands the diversity of small molecules to be attached by Li + @C 60 .