FACILE CYCLOADDITION OF TRANSITION METAL OXIDES ONTO THE SIDEWALL OF BORON-DOPED FULLERENE

The viability of facile oxidation and cycloaddition of fullerene C 60 with ruthenium tetraoxide ( RuO 4) has been confirmed by means of density functional theory calculations. Owing to the powerful capability of RuO 4 as an oxidant, the addition process has been found to occur readily in the absence of organic base as a catalyst, which is in remarkable contrast to the base-catalyzed osmylation of C 60 with osmium tetraoxide ( OsO 4). Significantly, we have found that boron can be employed as an effective promoter for enhancing the cycloaddition and complexation of transition metal oxides, e.g. RuO 4 and OsO 4, with C 60, in which the base is not needed at all. Our results suggest that boron doping into the lattice of fullerenes and carbon nanotubes would provide a well-defined approach for anchoring transition metal oxides.