R. Kitamaru et al., SOLID-SOLID PHASE-TRANSFORMATION OF UNIAXIALLY ORIENTED N-ALKANE CRYSTALS OF HIGH-PURITY, Journal of molecular structure, 355(1), 1995, pp. 95-104
The C-13 solid-state NMR spectrum and the spin-lattice relaxation time
, T-1C, have been measured at different temperatures for a uniaxially
oriented n-C27H56 crystal mat of purity 99.98%, setting the orientatio
n 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 p
hase A, A', and H, the molecular motions such as rapid local fluctuati
on and rotation about the molecular chain axis are discussed in the re
spective phases.