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Updated: Sep 23, 2025
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Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
Published on: February 15, 2016
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Mesophase behavior of new linear supramolecular hydrogen-bonding complexes
H A Ahmed1,2, M Hagar1,3, A Aljuhani4
1College of Sciences, Chemistry Department, Taibah University Yanbu Saudi Arabia hmahmoud@taibahu.edu.sa ahoda@sci.cu.edu.eg mohamedhaggar@gmail.com.
RSC Advances
|May 13, 2022
Summary
New hydrogen-bonded supramolecular complexes exhibit both smectic C and nematic liquid crystal phases. Increasing the mesogenic core length and linearity enhances the stability of these observed liquid crystal phases.
Area of Science:
- Materials Science
- Supramolecular Chemistry
- Liquid Crystals
Background:
- Hydrogen-bonded supramolecular complexes offer tunable properties.
- Liquid crystals are essential in display technologies and advanced materials.
Purpose of the Study:
- To synthesize and characterize novel hydrogen-bonded supramolecular complexes.
- To investigate the thermal and mesophase behavior of these new complexes.
- To compare their properties with related analogues.
Main Methods:
- Differential scanning calorimetry (DSC) for thermal analysis.
- Polarized light microscopy (PLM) for phase identification.
- Synthesis of complexes from 4-alkoxyphenylazobenzoic acid (I ) and 4-(4'-pyridylazophenyl)-4''-alkoxybenzoates (II ).
Main Results:
- Four new series of hydrogen-bonded supramolecular complexes (I /II m) were successfully prepared.
- All complexes exhibited dimorphic behavior, displaying both smectic C and nematic phases.
- Increasing the mesogenic core length and linearity of the complexes enhanced the stability of both smectic C and nematic phases.
Conclusions:
- The synthesized complexes demonstrate versatile liquid crystalline properties.
- Structural modifications, specifically core length and linearity, significantly influence mesophase stability.
- These findings contribute to the design of advanced liquid crystalline materials.
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