114480-69-2Relevant academic research and scientific papers
Asymmetry in molecular ordering in the nematic phase: DMR study
Wu, Bao-Gang,Ziemnicka, Barbara,Doane, J. William
, p. 1373 - 1382 (1988)
Deuterium nuclear magnetic resonance (2H-NMR) was performed on the rigid perdeuterated fluorene segment of the compound 2-fluorenyl-4'-tetradecyloxy benzoate (FLOC 14-d9) tounambiguously measure the order parameter U which reflects the degree of asymmetric ordering of the molecule in the nematic liquid crystalline phase.Measurements of U showed this parameter to be finite at all temperatures in the nematic phase indicative of the uniaxial phase U2 described in the Allender-Lee generalized Landau theory.Mixtures of FLOC 14-d9 with compounds consisting of molecules more cylindrical in shape were also studied to examine their effect on the parameter U.Other parameters such as the degree of order S and the orientation of the principal axes of the Maier-Saupe order matrix were measured and are discussed.
