A study of the thermodynamical interactions with solvents and surface characterisation of liquid crystalline 5-((S)-3,7-dimethyloctyloxy)-2-[[[4-(dodecyloxy)phenyl]imino]-methyl]phenol by inverse gas chromatography

• Published in: Journal of molecular liquids 2016-11, Vol.223, p.861-867
• Main Authors: Ocak, Hale, Mutlu-Yanic, Serap, Cakar, Fatih, Bilgin-Eran, Belkis, Guzeller, Dilek, Karaman, Ferdane, Cankurtaran, Ozlem
• Format: Article
• Language: English
• Subjects: Inverse gas chromatography; Liquid crystals; Surface properties; Thermodynamic interaction parameters
• ISSN: 0167-7322; 1873-3166
• DOI: 10.1016/j.molliq.2016.09.002

An inverse gas chromatography (IGC) study of thermodynamic interactions of a new chiral calamitic liquid crystalline 5-((S)-3,7-Dimethyloctyloxy)-2-[[[4-(dodecyloxy)phenyl]imino]methyl]phenol (DODPIMP) with some solvents was presented. The retention diagrams of the solvents on the DODPIMP were plotted by specific retention volumes, Vg0 at temperatures between 373.2 and 393.2K. The Flory-Huggins interaction parameter, χ12∞, the weight fraction activity coefficient, Ω1∞ and selectivity coefficients, α, of the structural isomers were determined for the DODPIMP liquid crystal. To characterize the surface properties of, retention diagrams of several non-polar and polar solvents on the DODPIMP were plotted by net retention volumes, VN in the temperature range from 303.2 to 318.2K. The dispersive surface energy, the thermodynamic adsorption parameters and the acid–base constants of the compound in the crystalline phase were determined. The results indicated a basic character for the surface of DODPIMP at the studied conditions. [Display omitted] •A new chiral calamitic liquid crystal DODPIMP was studied.•We reported thermodynamic and surface properties of DODPIMP.•A series of benzene are good solvents for DODPIMP.•DODPIMP is a basic character.