Solvent-dependent self-assemblies with multi-inverted circularly polarized luminescence based on...

Area of Science:

• Materials Science
• Supramolecular Chemistry
• Organic Electronics

Background:

• Amphiphilic molecules can self-assemble into ordered structures.
• Aggregation-induced emission (AIE) is a phenomenon where molecules become emissive upon aggregation.
• Chiral luminescence, particularly circularly polarized luminescence (CPL), is crucial for advanced optical applications.

Purpose of the Study:

• To investigate the self-assembly of DSA-Chol, an amphiphilic AIE molecule.
• To explore the chiral luminescent properties of the resulting assemblies.
• To determine the effect of solvent ratio on CPL signals.

Main Methods:

• Ordered self-assembly of DSA-Chol in solution.
• Characterization of the assemblies' morphology and structure.
• Spectroscopic analysis of luminescence and CPL properties.
• Systematic variation of the poor solvent ratio during assembly.

Main Results:

• DSA-Chol formed ordered assemblies with significant chiral luminescent properties.
• The CPL signals of the assemblies exhibited remarkable amplification.
• Multiple inversions of CPL signals were achieved by modulating the poor solvent ratio.
• This indicates a high degree of control over the chiral optical output.

Conclusions:

• The self-assembly of DSA-Chol provides a viable route to novel chiral luminescent materials.
• Tunable CPL signals can be achieved by controlling assembly conditions, specifically solvent ratios.
• These findings open avenues for developing advanced chiroptical devices and sensors.