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<p>Binary mixtures are derived from α-ketoglutaric acid (KGA) and benzoic acid (BAO). They are abbreviated as KGA+6BAO, KGA+9BAO and form liquid crystal phases. Four binary mixtures are isolated as the result of even molar proportion variation in the liquid crystals synthesized. Variation in the phase polymorphism of the binary mixtures is noticed as the result of molar proportion concentration with respect to the precursor material. Existence of intermolecular hydrogen bond is confirmed from Fourier Transform Infrared Spectroscopy (FTIR) analysis. Mesophase transition and the textural observation of the binary mixtures are identified through Polarizing Optical Microscope (POM) technique. Thermal behavior of these liquid crystalline binary mixtures is calculated from Differential Scanning Calorimetry (DSC) analysis. The different mesophases such as nematic, smectic C, and smectic G are observed at different temperature for all four binaries investigated. Physical parameters such as enthalpy and other thermal parameters are also obtained from DSC analysis. The results obtained through thermo chemical investigations suggest the active applicational utility of the binary mixtures prepared.</p>

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Thermochemical Investigations on Double Hydrogen Bond Liquid Crystalline Mixtures

  • 期刊论文

  • 发表日期：

    2026年3月10日

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  • Gopi Govindhan,
  • Pongali Sathya Prabu N.

摘要

Binary mixtures are derived from α-ketoglutaric acid (KGA) and benzoic acid (BAO). They are abbreviated as KGA+6BAO, KGA+9BAO and form liquid crystal phases. Four binary mixtures are isolated as the result of even molar proportion variation in the liquid crystals synthesized. Variation in the phase polymorphism of the binary mixtures is noticed as the result of molar proportion concentration with respect to the precursor material. Existence of intermolecular hydrogen bond is confirmed from Fourier Transform Infrared Spectroscopy (FTIR) analysis. Mesophase transition and the textural observation of the binary mixtures are identified through Polarizing Optical Microscope (POM) technique. Thermal behavior of these liquid crystalline binary mixtures is calculated from Differential Scanning Calorimetry (DSC) analysis. The different mesophases such as nematic, smectic C, and smectic G are observed at different temperature for all four binaries investigated. Physical parameters such as enthalpy and other thermal parameters are also obtained from DSC analysis. The results obtained through thermo chemical investigations suggest the active applicational utility of the binary mixtures prepared.