Thermodynamics of Solution of Nonmesomorphic Solutes at Infinite Dilution in the Isotropic and Nematic Phases of p-Cyanophenyl p-n-Alkylbenzoates

Infinite-dilution activity coefficients (γ2 ∞) and partial molar excess enthalpies and entropies obtained using gas−liquid chromatography are reported for 10 solutes, varying in molecular size, shape and flexibility, in the isotropic and the nematic phases of the ethyl, propyl, butyl, pentyl, hexyl,...

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Bibliographic Details
Published in:Journal of chemical and engineering data 1997-09, Vol.42 (5), p.996-1003
Main Authors: Oweimreen, Ghassan A, Al-Tawfiq, Ali M
Format: Article
Language:English
Subjects:
Chemical thermodynamics
Chemistry
Exact sciences and technology
General and physical chemistry
Mixtures
Thermodynamic properties
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Summary:Infinite-dilution activity coefficients (γ2 ∞) and partial molar excess enthalpies and entropies obtained using gas−liquid chromatography are reported for 10 solutes, varying in molecular size, shape and flexibility, in the isotropic and the nematic phases of the ethyl, propyl, butyl, pentyl, hexyl, and heptyl members of the p-cyanophenyl p-n-alkybenzoate homologous series of liquid crystals. General trends in the six solvents are identified. The results, which corroborate earlier results, demonstrate the effects that the solute structure and the length of the flexible alkyl tail on the solvent molecule have on the solution process.
ISSN:0021-9568
1520-5134
DOI:10.1021/je970075r