New platforms integrating ethynyl-grafted modules for organogels and mesomorphic superstructures

Area of Science:

• Organic Chemistry
• Materials Science
• Supramolecular Chemistry

Background:

• Development of novel organic molecules with specific self-assembly properties is crucial for advanced materials.
• Columnar mesophases and gelation are important phenomena in liquid crystal and soft matter research.

Purpose of the Study:

• To synthesize a new methyldiacylaminophenyl derivative incorporating gallic and alkynyl functionalities.
• To investigate the self-assembly behavior and physical properties of the synthesized compound, including mesophase formation and gelation.

Main Methods:

• Synthesis of the target molecule starting from 2,6-diamino-4-iodotoluene.
• Thermal analysis to observe mesophase transitions.
• Acetone gelation studies to evaluate supramolecular assembly.

Main Results:

• Successful synthesis of a methyldiacylaminophenyl core with gallic derivatives and alkynyl groups.
• Observation of typical columnar mesophases upon heating the synthesized iodo and ethynyl molecules.
• C(12) synthons with protected terminal alkyne groups demonstrated acetone gelation via interlocked fiber formation.

Conclusions:

• The synthesized compound exhibits liquid crystalline properties, forming columnar mesophases.
• Intermolecular hydrogen bonding facilitates the formation of interlocked fibers, leading to the gelation of acetone.
• The study demonstrates a route to functional organic materials with tunable self-assembly characteristics.