We investigated solvent-solute effects using dye-doped nematic liquid
crystals (NLCs) where three Sudan dyes of different concentrations were
used as solutes doped into high- and low-polar NLCs as anisotropic solvents.
The polarized spectroscopic absorption, dichroic ratio (R), and
order parameter (S) were measured, which showed that the rod-like
Sudan black B had a higher S and R due to a higher anisotropic solventsolute
effect produced by transition moment and global charge transfer
along the molecular axis induced by high polar NLC. The order parameters
measured by the Vuksmethod also showed a higher solvent-solute
effect for the high-polar NLC.
