Abstract

Using multi frequency electron paramagnetic resonance (EPR) it was possible to determine the inherent fine structure (FS) interaction of nitrogen encapsulated in a C70 cage. Confinement of N@C70 in single wall carbon nanotubes (SWNT) of rather wide diameter does not significantly influence this value. The transition between isotropic molecular tumbling and immobilization was found to occur at about 170 K in both matrices, indicating that the hindrance potential is quite small in both cases.

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