Orientational characteristics of liquid crystals (5CB) by means of optical study

Abstract Information on molecular dynamics of the nematic liquid crystal 4-n-pentyl-4′-cyanobiphenyl (5CB) doped with the dyes DMANS and DMANAB has been obtained by luminescence and Raman measurements. Temperature dependences of reorientational correlation times are not the same for different molecular motions. Mechanisms responsible for the marked deviation of the time values obtained by different optical methods are discussed.