کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
204035 460693 2007 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Liquid crystal solutions at infinite dilution: Solute phase transfer free energy and solubility parameter variations at phase conversion temperatures
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Liquid crystal solutions at infinite dilution: Solute phase transfer free energy and solubility parameter variations at phase conversion temperatures
چکیده انگلیسی

Thermodynamic properties of three organic solute families in 4,4-bis(heptyloxyl)azoxybenzene (BHOAB) at infinite dilution were determined from gas–liquid chromatographic retention data. The reduced free energies of transfer of solutes between liquid crystal phases at transition temperatures were determined and related to the “disorder parameter” of Flory's liquid crystal theory. Reduced free energies of transfer between phases were functions of solute solubility parameters. From these, the “effective solubility parameters” of the liquid crystal phases could be evaluated. The effective solubility parameter of the smectic phase was lower than the other phases, despite being determined at lower temperatures and higher phase density. Changes in liquid crystal organization in the mesophases, which affect functional group contacts between the liquid crystal and solute molecules, are proposed to explain this behavior.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fluid Phase Equilibria - Volume 253, Issue 1, 1 April 2007, Pages 42–47
نویسندگان
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