Transition from Homochiral Clusters to Racemate Monolayers during 2D Crystallization of Trioxa[11]helicene on Ag(100)

Area of Science:

• Supramolecular Chemistry
• Materials Science
• Nanotechnology

Background:

• Chirality plays a crucial role in molecular recognition and self-assembly.
• Distinguishing between enantiomers in self-assembled structures is essential for understanding their properties.

Purpose of the Study:

• To develop and demonstrate a method for determining the sense of helicity in trioxa[11]helicene enantiomers.
• To discriminate between homo- and heterochiral 2D self-assembly using atomic force microscopy.

Main Methods:

• Utilized atomic force microscopy (AFM) for high-resolution imaging of self-assembled monolayers.
• Applied AFM to analyze the topographical features indicative of helical structures.

Main Results:

• Successfully determined the sense of helicity for trioxa[11]helicene enantiomers.
• Demonstrated the capability of AFM to differentiate between homo- and heterochiral arrangements in 2D self-assembly.

Conclusions:

• Atomic force microscopy is a powerful tool for probing the chirality of molecules in self-assembled systems.
• The findings provide insights into controlling and characterizing chiral self-assembly at the nanoscale.