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Area of Science:

  • Materials Science
  • Supramolecular Chemistry
  • Photochemistry

Background:

  • Columnar liquid crystals offer unique self-assembly properties.
  • Phosphorescent materials are crucial for advanced optical applications.
  • Ternary inorganic compounds and crown ethers can form stable host-guest complexes.

Purpose of the Study:

  • To design novel phosphorescent columnar liquid crystalline hybrid materials.
  • To investigate the thermal stability and luminescence properties of these hybrid materials.
  • To explore the stimuli-responsive luminescence behavior based on the surrounding atmosphere.

Main Methods:

  • Synthesis of hybrid materials by combining Cs2Mo6Br14 and 18-crown-6 ethers with o-terphenyl units.
  • Thermal analysis to determine stability at high temperatures.
  • Photoluminescence spectroscopy to characterize emission properties and switching behavior.

Main Results:

  • Successfully synthesized stable host-guest complexes of Cs2Mo6Br14 and functionalized 18-crown-6 ethers.
  • Demonstrated reversible switching between high and low luminescence states based on atmospheric conditions.
  • Observed stable emission intensity up to 140 °C, indicating excellent thermal robustness.

Conclusions:

  • The designed hybrid materials exhibit promising properties for advanced optical and sensing applications.
  • The combination of inorganic clusters and organic hosts leads to robust and responsive luminescent materials.
  • These materials represent a new class of stimuli-responsive phosphorescent liquid crystals.