Supramolecular Substructure of C₆₀-Embedded Schwarzite

Area of Science:

• Materials Science
• Chemistry
• Nanotechnology

Background:

• Carbon allotropes, such as fullerenes and graphene, exhibit unique properties.
• Schwarzites are hypothetical carbon allotropes with negatively curved structures.
• Designing novel carbon materials with tailored properties is an ongoing challenge.

Purpose of the Study:

• To introduce and characterize a new carbon allotrope concept: fullerene-embedded schwarzite.
• To investigate the stability and interactions within a fullerene-schwarzite complex.
• To explore the potential for developing multi-component sp²-carbon materials.

Main Methods:

• Isolation of crystals of fullerene (C₆₀) embedded in a polycyclic aromatic hydrocarbon (PAH) substructure (1).
• Theoretical stability studies using the Absolutely Localized Molecular Orbital Energy Decomposition Analysis (ALMO-EDA).
• Analysis of noncovalent interactions using Non-Covalent Interaction (NCI) plots and Hirshfeld-surface analysis.

Main Results:

• Successful isolation of a complex, C₆₀⊂(1)₄, representing a fullerene-schwarzite substructure.
• Theoretical calculations confirmed the stability of the complex, primarily driven by dispersion forces.
• Noncovalent interaction analyses provided detailed insights into the binding mechanism.

Conclusions:

• The study presents a novel fullerene-embedded schwarzite structure.
• Noncovalent interactions, particularly dispersion forces, are crucial for stabilizing such multi-component carbon complexes.
• This work opens new avenues for designing advanced sp²-carbon allotropes.