気液クロマトグラフィーによる液晶物質の熱力学的研究(第1報)固定相中の液晶量の影響

概要

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The interaction between alkanes with various chain length (solute) and liquid crystal substance, cholesteryl myristate (ChM : crystal→smectic→cholesteric→isotropic liquid), was studied by gas-liquid chromatography (GLPC), its stationary phase being composed of ChM and solid support, Chromosorb W. With variations in the gas flow-rate, ChM content in the stationary phase, and column temperature, the specific retention volume of each solute, V_g, was measured and its standard free energy, enthalpy, and entropy of solution in ChM, Δ_<soln> G_2^⦵, Δ_<soln> H_2^⦵, Δ_<soln> S_2^⦵, were calculated. The gas flow-rate had a slight effect on V_g of the stationary phase with a large ChM content, although this effect could be nullified by the extrapolation of V_g to zero flow-rate. Logarithm of V_g or Δ_<soln> G_2^⦵ depends almost linearly on the ChM content. From the analysis of Δ_<soln> G_2^⦵ vs. temperature relationship, the effect of ChM content on Δ_<soln> G_2^⦵ was found to be due to the contribution of Δ_<soln> S_2^⦵, i.e., destruction of the liquid crystal structure by solute molecules.
社団法人日本薬学会の論文
1978-06-25