Hydrogenation of C-60 in Peapods: Physical Chemistry in Nano Vessels

Journal Of Physical Chemistry C 113, 8583 - 8587 (2009)

Hydrogenation of C-60 in Peapods: Physical Chemistry in Nano Vessels

E. Abou-Hamad, Y. Kim, A.V. Talyzin, C. Goze, D.E. Luzzi, A. Rubio, T. Wagberg

Hydrogenation of C60 molecules inside SWNT was achieved by direct reaction with hydrogen gas at elevated pressure and temperature. Evidence for the C60 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 sp3 carbon resonances. We estimate that approximately 78% of the C60 molecules inside SWNTs are hydrogenated to an average degree of 14 hydrogen atoms per C60 molecule. As a consequence, the rotational dynamics of the encapsulated C60Hx molecules is clearly hindered. Our successful hydrogenation experiments open completely new roads to understand and control confined chemical reactions at the nano scale.

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http://dx.doi.org/10.1021/jp8095743

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