Tseng W Y, Chen Y H, Khairullin I I, Cheng S, Hwang L P
Department of Chemistry, National Taiwan University, Taipei.
Solid State Nucl Magn Reson. 1997 Aug;8(4):219-29. doi: 10.1016/s0926-2040(97)00013-1.
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.
为了了解C60的动力学以及C60与γ-环糊精（γ-CyD）之间的相互作用，采用核磁共振光谱方法对C60与γ-环糊精的固体复合物进行了研究。13C固体交叉极化魔角旋转（CP/MAS）核磁共振谱显示C60在142.6 ppm处有共振。这为C60中的13C自旋与γ-CyD主体中的1H自旋之间的相互作用提供了证据。在不同接触时间下对13C CP/MAS NMR进行的室温实验表明，与γ-环糊精结合的水在核弛豫过程中起着重要作用。利用温度和场依赖的13C自旋晶格弛豫时间测量研究了γ-环糊精中C60的动力学。在250 K以下，水对C60动力学的影响不太显著。
