  Infrared spectroscopy (IR) and quantum chemistry calculations that are based
on the density functional theory (DFT) have been used to study the structure,
molecular interactions of the nematic and twist-bend phases for
thioether-linked dimers. Infrared absorbance measurements were conducted in a
polarized beam for a homogeneously aligned sample in order to obtain more
details about the orientation of the vibrational transition dipole moments. The
distributions to investigate the structure and conformation of the molecule
dihedral angle were calculated. The calculated spectrum was compared with the
experimental infrared spectra and as a result, detailed vibrational assignments
are reported.
