In application of liquid crystals (LCs) as solvents, it is required to obtain the polarity and solvatochromic polarity
parameters such as the Kamlet–Abboud–Taft polarity functions. In this study, solvatochromic polarity parameters
of some cyanobiphenyl nematic liquid crystals were acquired in different temperatures and phases, isotropic and
anisotropic phases, using the Reichardt’s dye and 2,6-diphenyl-4-(2,4,6-triphenyl-1-pyridinio)phenolate standard
probe. In addition, to decrease the overlapping of the absorption band of probe with the absorption bands of
LCs and to increase the solubility of the probe in LCs, a new azo dye was used as a probe for obtaining some
solvatochromic polarity parameters. Finally, a new polarity parameter, the LC anisotropic matrix, is introduced.
کلید واژگان :
solvatochromism probe; cyanobiphenyl liquid crystal; matrix anisotropy; Kamlet–Abboud–Taft polarity function
