Determination of thermodynamic properties and phase transition temperatures of phenylbenzoate-based calamitic liquid crystals by inverse gas chromatography method

Cakar A., ÇAKAR F., OCAK H., Karavelioglu S., BİLGİN ERAN B., CANKURTARAN Ö.

Phase Transitions, vol.96, no.11-12, pp.731-745, 2023 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 96 Issue: 11-12
  • Publication Date: 2023
  • Doi Number: 10.1080/01411594.2023.2272018
  • Journal Name: Phase Transitions
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Page Numbers: pp.731-745
  • Keywords: Inverse gas chromatography, Liquid crystal, phase transition temperature, thermodynamic properties
  • Yıldız Technical University Affiliated: Yes


In this study, Phenylbenzoate-based calamitic liquid crystals (LCs) were synthesized and characterized, and then the thermodynamic properties and phase transition temperatures were investigated by inverse gas chromatography (IGC) at infinite dilution. The phase transition temperatures of the LCs were determined in the range of 40–170°C by the IGC method. Finally, in the thermodynamic equilibrium region (the range of 160–200°C), Flory-Huggins theory and the equation of state theory with the LC-solvent interaction parameters, the effective exchange energy parameters, the weight fraction activity coefficient, and also the partial molar heat of mixing at infinite dilution of solvent, the molar heat of vaporization of solvent, and the partial molar heat of sorption of solvent were calculated.