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<p>Chiral hydrogen-bond liquid crystal complexes (HBLCs) are assembled via hydrogen bonding between (S)-( +)-Phenylsuccinic acid (SPSA) and 4-n-(Alkyloxy)benzoic acids (nOBA, <i>n </i>= 10 &amp; 11). The thermal behaviour of the mesogenic phases, along with their corresponding textural variations has been assessed using polarizing optical microscopy (POM) and differential scanning calorimetry (DSC). Significant decrease in the melting point of the HBLC complexes relative to their individual components justifies the formation of hydrogen bonding between SPSA and nOBA. The bathochromic shift is observed in the FT-IR spectra of HBLC complexes provides clear evidence of H-bond formation. The UV–Vis analysis confirms a band gap energy of around 3.5&#xa0;eV for the present HBLC mixtures. The presence of various interactions in the HBLC complex has been reported using density functional theory calculations (DFT-optimized geometry, Interaction region indicator, and Non-linear optical studies). Experimentally observed values are justified with theoretical calculations.</p> Graphical abstract <p></p>

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Impact of hydrogen bonds on mesophase behaviours: Thermal and optical properties of chiral hydrogen bond liquid crystals

  • 期刊论文

  • 发表日期：

    2026年3月12日

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  • S. Kavitha,
  • M. Saravanakumar,
  • V. Balasubramanian,
  • V. N. Vijayakumar,
  • Sujay Chakravarty

摘要

Chiral hydrogen-bond liquid crystal complexes (HBLCs) are assembled via hydrogen bonding between (S)-( +)-Phenylsuccinic acid (SPSA) and 4-n-(Alkyloxy)benzoic acids (nOBA, n = 10 & 11). The thermal behaviour of the mesogenic phases, along with their corresponding textural variations has been assessed using polarizing optical microscopy (POM) and differential scanning calorimetry (DSC). Significant decrease in the melting point of the HBLC complexes relative to their individual components justifies the formation of hydrogen bonding between SPSA and nOBA. The bathochromic shift is observed in the FT-IR spectra of HBLC complexes provides clear evidence of H-bond formation. The UV–Vis analysis confirms a band gap energy of around 3.5 eV for the present HBLC mixtures. The presence of various interactions in the HBLC complex has been reported using density functional theory calculations (DFT-optimized geometry, Interaction region indicator, and Non-linear optical studies). Experimentally observed values are justified with theoretical calculations.

Graphical abstract