抄録
Structural and dynamical properties have been investigated for the core part of R-MHPOBC in the liquid crystalline phases. The alignment-induced shift of the 13C resonance frequencies are analyzed with a theoretical model based on Wigner order parameters and the three components of the chemical shielding tensor for each carbon, which were determined with the local field separated 2-dimensional spinning sideband spectroscopy in the solid state. It has been found that the molecular long axis is located at 7.3deg. and 8.0deg. away from the biphenyl and phenyl para-axes, respectively. The Saupe orientational order parameter of the molecular core has been determined to be 0.75 at 135deg). C. It is most likely that both rings exhibit 180deg. flip about their para axes in the liquid crystalline phases.
