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- W424943668 abstract "Fullerenes form cocrystals with a great variety of organic molecules. The majority of these materials belongs to various host-guest systems, depending on the shape and size of the counter molecules. Fullerene-cubane cocrystals represent a special family: none of the components form a host framework, they rather form separated sublattices[1]. The major stabilizing factor of such structures is the almost perfect mach of the molecular surfaces of convex fullerenes and concave cubanes. The expanded fullerene sublattice confines cubanes in static positions. On the other hand, the atomic arrangement of the fullerene surface is incommensurate with that of cubane, therefore, the rotation of fullerenes has no influence on the match. Thus, cubanes behave as a molecular bearing for the freely rotating fullerene, resulting in unusual dynamics. The alternating array of static and rotating components distincts this family of rotor-stator phases from both the orientationally ordered and plastic crystals. Rotor-stator properties slightly depend on the size and symmetry of the fullerenes and the substituents of cubane, but the major properties are characteristic of the whole family. We present here a new member of this family, the rotor-stator cocrystal of the endohedral Sc3N@C80 with cubane. In this material the rotor-stator properties of the molecules are extended to the rotation of the endohedral Sc3N units. Besides the cubic shaped cubane, octahedral and other high-symmetry molecules may form similar cocrystals with fullerenes. In the absence of octahedral molecules of suitable size, we studied the fullerene cocrystals with the distorted octahedral pairs of mesitylene. We compare the influences of the cubic and octahedral shapes on the structures and properties." @default.
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- W424943668 date "2012-01-01" @default.
- W424943668 modified "2023-09-26" @default.
- W424943668 title "ROTOR-STATOR COCRYSTALS OF FULLERENES WITH CUBIC AND OCTAHEDRAL MOLECULES" @default.
- W424943668 hasPublicationYear "2012" @default.
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