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Photoswitchable Polar Azobenzene-Based Liquid Crystals for Electro-Optic and Optical Data Storage Applications.

Bugra K Debbarma1, Rahul Ahmed2, Gurumurthy Hegde3

  • 1Department of Chemistry, University of Science & Technology Meghalaya, Ri-Bhoi, Meghalaya, India.

Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry
|June 30, 2026
PubMed

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Summary

New polar rod-like molecules with azobenzene moieties exhibit robust photochromic behavior. These materials show potential for advanced optical data storage and smart sensor applications.

Area of Science:

  • Materials Science
  • Organic Chemistry
  • Physical Chemistry

Background:

  • Photoswitchable materials are crucial for advanced technologies like solar energy harvesting and data storage.
  • Azobenzene-containing molecules are key components in developing responsive materials.

Purpose of the Study:

  • To synthesize and characterize novel polar rod-like molecules featuring the azobenzene photoswitch.
  • To investigate the electro-optic properties and photochromic behavior of these new compounds.
  • To evaluate their potential for applications in optical data storage.

Main Methods:

  • Synthesis of polar rod-like molecules with azobenzene units.
  • Characterization using electro-optic measurements (spontaneous polarization), crystal structure analysis, and photoisomerization studies.
Keywords:
azobenzeneliquid crystaloptical data storagephotoswitching

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  • Fabrication and testing of optical storage devices.

    • Main Results:

    • Compounds exhibited both nematic and orthogonal smectic phases.
    • High spontaneous polarization values were measured (1.38–1.74 μC/cm²).
    • Consistent photochromic behavior with high conversion efficiencies (83–93%) and long relaxation times (~20 h) was observed.
    • Optical storage devices showed excellent contrast.

    Conclusions:

    • The synthesized molecules possess desirable properties for photoswitchable applications.
    • Their robust photochromism and high polarization make them promising for next-generation optical data storage.
    • Further research can explore their use in smart sensors and artificial muscles.