Hydrogen-bonded rosettes comprising π-conjugated systems as building blocks for functional one-dimensional...

Area of Science:

• Supramolecular chemistry
• Materials science
• Organic electronics

Background:

• Hydrogen-bonded supermacrocycles (rosettes) are disk-shaped synthons for columnar nanoassemblies.
• They can act as monomer units for supramolecular polymers and components in soft matter.
• This review explores their advantages over expanded π-conjugated covalent molecules.

Purpose of the Study:

• To review the self-assembly of π-conjugated molecules into rosettes.
• To illustrate the merits of using rosette motifs for creating functional columnar nanoassemblies.
• To highlight unique properties and applications of rosette-based systems.

Main Methods:

• Self-assembly of photochemically and electrochemically active π-conjugated molecules.
• Formation of supramolecular rosettes via complementary hydrogen bonding.
• Characterization of rosette structures, properties, and functionalities.

Main Results:

• Rosettes provide access to well-defined, expanded π-surfaces with higher association constants.
• Columnar nanoassemblies exhibit unique self-assembly, chiroptical, photophysical, and electrochemical properties.
• Stimuli responsiveness of building blocks is amplified in rosette-organized structures.

Conclusions:

• Supramolecular rosettes are advantageous for creating stable, functional columnar nanoassemblies.
• These assemblies possess unique nanoscale and bulk properties.
• Rosette motifs show promise in supramolecular polymers, photovoltaic devices, and other applications.