engleski

Production of C_(59)N-C_(60) Solid Solution

We describe a simple way to produce large quantities of solid solutions of monomer C_(59)N in pure C_(60) using an electric gas discharge tube. Typical concentrations are 10^(-5) to 10^(-4) C_(59)N with respect to C_(60). The N-14 and several C-13 hyperfine constants were measured by ESR. These are a sensitive test for electronic structure calculations of the monomer. As the temperature is raised towards the sc to fcc structural transition at 261 K, the ESR spectrum motionally narrows and the activation energy for reorientation is measured. The rotational dynamics of the C_(59)N monomer between 130 and 600 K parallels that of C_(60) in the bulk thus interactions between C_(59)N and C_(60) are surprisingly weak.

C_(59)N; C_(60); solid solutions; fullerenes; carbon nanotubes; ESR; electronic structure; solid-state phase transformations; chemical structure; molecular configurations; hyperfine structure

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