Circularly Polarized Luminescence Inversion Induced by Achiral Dyes in Organogels

Area of Science:

• Materials Science
• Supramolecular Chemistry
• Luminescence

Background:

• Circularly polarized luminescence (CPL) materials are crucial for advanced optical applications.
• Current CPL material design often relies on centrally chiral systems and enantiomer control.
• Regulating CPL signals via achiral fluorophore-chiral gelator interactions and emission wavelength tuning remains a challenge.

Purpose of the Study:

• To develop a novel strategy for designing CPL materials with tunable properties.
• To investigate the control of CPL sign and emission wavelength through supramolecular assembly.
• To explore the role of achiral fluorophore-chiral gelator interactions in CPL behavior.

Main Methods:

• Fabrication of binary supramolecular gels using achiral cyanostilbene derivatives and a chiral gelator.
• Investigation of supramolecular assembly and CPL properties.
• Analysis of intermolecular interactions, particularly hydrogen bonding.

Main Results:

• Two distinct binary supramolecular gels were successfully synthesized.
• Achiral fluorophore-induced CPL sign inversion was observed in the developed gels.
• The CPL sign inversion is attributed to specific hydrogen bonding interactions between the fluorophore and gelator.

Conclusions:

• A rational design approach for CPL materials with tunable CPL sign and emission wavelength was established.
• The study highlights the potential of achiral components in designing sophisticated CPL systems.
• This work offers new possibilities for advanced optical materials based on supramolecular chemistry.