Dielectric spectroscopy has been used to determine the barriers of rotation of surface-mounted fullerenes (2.3 ± 0.1 and 4.3 ± 0.1 kcal mol-1). In order to achieve this, a C60 derivative equipped with an anchoring group designed to form a surface inclusion with the hexagonal form of tris(o-phenylenedioxy)cyclotriphosphazene (TPP) has been synthesized. Solid-state NMR analysis revealed that approximately 50% of the surface-mounted molecules have a chemical environment different from the others suggesting two distinct insertion modes. These observations correlate with results of DFT calculations.

Department of Chemistry and Biochemistry University of Colorado Boulder Colorado 80309 USA

Department of Chemistry University of Oxford Chemistry Research Laboratory Oxford OX1 3TA UK

Department of Physics University of Colorado Boulder Colorado 80309 USA

Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences Flemingovo nám 2 160 00 Prague 6 Czech Republic

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