Structural characterization and molecular dynamics of fullerene or fullerene-derivative nanowhiskers

Recently, a new type of fibrous fullerene crystals called fullerene nanowhisker has been reported by a liquid-liquid interfacial precipitation method using saturated $m$-xylene solution of fullerene and isopropyl alcohol. Considerable interests have been generated in the structure and properties of fullerene or fullerene-derivative nanowhiskers. In this study, we present the results of structural characterization and molecular dynamics of C$_{60}$, C$_{70}$ and C$_{61}$H$_{2}$ --nanowhiskers(NWs) by x-ray diffraction and solid state NMR. The XRD pattern of as-grown C$_{60}$-NWs have a hexagonal structure with lattice constants of $a$=23.732 and $c$=10.126. Both solid-state $^{13}$C-CP/MAS and wideline $^{1}$H-NMR measurement clearly shows that $m$-xylene molecules are included in NWs. Both lineshape and spin-lattice relaxation time of wideline $^{13}$C-NMR measurements clearly show that C$_{60}$-NWs$ exhibited the phase transition at 250 K. Detailed results on the molecular dynamics and the other properties for C$_{60}$-, C$_{70}$- or C$_{61}$H$_{2}$-NWs will be presented.