Abstract
The 13C solid-state NMR spectrum and the spin-lattice relaxation time, T 1C, have been measured at different temperatures for a uniaxially oriented n-C 27H 56 crystal mat of purity 99.98%, setting the orientation axis parallel or perpendicular to the static magnetic field. On the basis of the change in the lineshape and T 1C value in the different phase A, A′, and H, the molecular motions such as rapid local fluctuation and rotation about the molecular chain axis are discussed in the respective phases.
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