Hydrogenation of C 60 molecules inside SWNT was achieved by direct reaction with hydrogen gas at elevated pressure and temperature. Evidence for the C 60 hydrogenation in peapods is provided by isotopic engineering with specific enrichment of encapsulated species and high resolution 13C and 1H NMR spectroscopy with the observation of characteristic diamagnetic and paramagnetic shifts of the NMR lines and the appearance of sp 3 carbon resonances. We estimate that approximately 78% of the C 60 molecules inside SWNTs are hydrogenated to an average degree of 14 hydrogen atoms per C 60 molecule. As a consequence, the rotational dynamics of the encapsulated C 60H x molecules is clearly hindered. Our successful hydrogenation experiments open completely new roads to understand and control confined chemical reactions at the nano scale.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films