title: NMR study of solid C60(gamma-cyclodextrin)2.
abstract: A solid complex of C60 with gamma-cyclodextrin (gamma-CyD) was examined with NMR spectroscopic methods in order to understand the dynamics of C60, and the interaction between C60 and gamma-CyD. A 13C solid-state cross-polarization magic angle spinning (CP/MAS) NMR spectra shows C60 resonance at 142.6 ppm. This provides the evidence of interaction between 13C spins in C60 and 1H spins in the gamma-CyD host. Ambient temperature experiments on the 13C CP/MAS NMR, with varying contact time, shows that the water associated with gamma-CyDs plays an important role in the nuclear relaxation processes. The dynamics of C60 in gamma-CyD was investigated using temperature and field-dependent 13C spin-lattice relaxation time measurements. The influence of water on the dynamics of C60 was less significant below 250 K.
authors.affiliation: Department of Chemistry, National Taiwan University, Taipei.
authors.forename: W Y
authors.initials: WY
authors.lastname: Tseng
authors.forename: Y H
authors.initials: YH
authors.lastname: Chen
authors.forename: I I
authors.initials: II
authors.lastname: Khairullin
authors.forename: S
authors.initials: S
authors.lastname: Cheng
authors.forename: L P
authors.initials: LP
authors.lastname: Hwang
mesh_terms: D002244:Carbon / Q000737:chemistry*; D002247:Carbon Isotopes; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D003505:Cyclodextrins / Q000737:chemistry*; D037741:Fullerenes; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D013696:Temperature; D014961:X-Ray Diffraction; D047408:gamma-Cyclodextrins
chemical_list: D002247:Carbon Isotopes; D003505:Cyclodextrins; D037741:Fullerenes; D047408:gamma-Cyclodextrins; D002244:Carbon; C023792:gamma-cyclodextrin; C069837:fullerene C60